Eeschema: better name for m_SheetList (changed to m_SheetPath) member of  class NETLIST_OBJECT.

Eeschema: netlist generation: fix bad choice for the "best net name" when selecting a net name between labels connected to the same net.
Code cleanup and remove unused file.

Fix an annoying issue about not named nets:
now, these nets are named from the component references and pin names which are connected.
therefore, unless the net or the footprint references are modified, the net name is not modified between 2 netlist calculations.

All: remove macros  MAX, MIN, ABS from macros.h and replace these macros by std::max, std::min and std::abs (mainly found in old code).

* Convert Eeschema from manually linked list to DLIST for storing
  SCH_ITEM objects.
* Add helper functions to SCH_SCREEN for appending list of SCH_ITEM
  objects.
* Fix bug in wire editing code for accurate undo/redo behavior.
* Add member to DLIST to append another DLIST.
* Other minor code cleaning.

In common.cpp GetTimeStamp is renamed GetNewTimeStamp (a better name).
Pcbnew: prepare work to calculate connections between pads that inteserct and therefore can be connected without any track (composite pads).

* Move the hierarchical label connected test into the NETLIST_OBJECT class.
* ERC pin type strings can now be translated.
* Remove unused EDA_DRAW_PANEL attribute from all ERC test functions.
* Add get marker count method to SCH_SCREENS object.
* Redundant header removal.
* Lots of coding style policy fixes.

Use UTF-8 encoding only in kicad files. Under Linux, this was already the case. Under Windows, texts with  non ascii characters must be corrected.
This ensure compatibility between platforms.

* Move schematic wire and bus break code into schematic screen object.
* Move schematic test for dangling ends into schematic screen object.
* Remove left over debugging output in schematic screen object.
* Remove unused file eeschema/cleanup.cpp.
* Fix bug in schematic line object hit test algorithm.
* Fix a string concatenation compile error added in r2752.
* Rename class WinEDA_BasicFrame to EDA_BASE_FRAME.
* Rename class WinEDA_DrawFrame to EDA_DRAW_FRAME.
* Rename class WinEDA_DrawPanel to EDA_DRAW_PANEL.

* Fix bug that prevented component from being replaced in library when
  the component root name was changed.
* Fix drawing bug when changing text or field item string while move in
  progress.
* Fix drawing bug when rotating text item while move in progress.
* Prevent undo or redo when editing a component draw item.
* Fix assert bug when replacing component in library when the component
  root name was changed.
* Fix bug in field editor caused by new root alias implementation that
  prevented any field from being changed.
* Fix minor spacing issues with EESchema find dialog.
* Deprecate remaining internal linked list code from component library
  objects.
* Rename pin object files to match new library object file naming
  scheme.
* Move LIB_TEXT object definition into it's own header file.

* Continue component library class clean up and encapsulation work.
* Change hierarchical sheet label container to boost::vector_ptr.
* Encapsulate hierarchical label handling in hierarchical sheet class.
* Convert some missed occurrences of wxString::GetData() to GetChars( wxString ).
* Fix some minor code formatting issues.

* Fixed EESchema options dialog focus bug so escape key now works in GTK.
* Rename schematic objects for improved readability.
* Fixed GCC compiler warnings in plot code.
* Added paragraph in UIpolicies.txt about setting dialog box sizes.
* Lots of message box string clean up.

* Complete comment translation for all EESchema source files.
* Complete comment translation for all 3D viewer source files.
* Rename class class_hierarchical_PIN_sheet to SCH_SHEET_PIN.
* Rename class DrawSheetStruct to SCH_SHEET.
* Tool tip capitalization fixes.
* Uncrustify and spell check comments and strings in all modified source
  files.

* Translate comments in source files beginning with A-E in eeschema.
* Spell check comments and strings and uncrusified all modified files.

* Component library objects renamed for improved readability.
* Fields now move when selected in library editor.
* Add copy constructor to all library draw and library component objects.
* Added copy constructor to EDA_BaseStruct.
* Delete base screen in WinEDA_DrawFrame destructor to prevent potential memory leak.
* Fixed memory access bug when replacing and adding a component to library.
* Moved library component block manipulation code into component object.
* Removed all of the global variables used by the library editor main window object.
* The usual code cleaning and refactoring.

3D view: fixed: mirrored texts incorrectly drawn

Global variable unobfuscation, new library path search, and lots of other changes.  See CHANGELOG.txt.