* Make the tool bar dockable.
* Enable the overflow control in the tool bar in case the it does not fit in
  it's parent window.
* Fix some wxAuiPaneInfo usage issues.
* Remove unused wxAuiPaneInfo objects.
* Move perspective saving and loading into EDA_BASE_FRAME object in preparation
  for extending this to all frame windows.

Plot functions: some enhancements in mirror mode (Pcbnew specific): boards are mirrored horizontally, and the page layout is no more mirrored, and therefore is always readable.

Moved scaling of font glyphs to the moment when they are created (eliminated a few multiplications unnecessary variables).
Changed some magic numbers into constants.

* Replace illegal file system characters when reading legacy libraries to
  prevent FPID parsing errors and allow saving to PRETTY file format.
* Create validator to filter illegal file system characters from footprint
  name text edit controls to prevent issues when saving to PRETTY file format.
* Add missing source file licenses and some minor coding policy fixes.

Now footprints, after loaded by reading a netlist are grouped by sheets by the footprints spread function, and the grouping is better.
Rename 2 files. Fix minor issues. Clean code

   comment for GITHUB_PLUGIN which should flow into Doxygen output.
*) Rewrote: 
        PCB_BASE_FRAME::Save_Module_In_Library(): now uses fp-lib-table and PROPERTIES.  
        PCB_EDIT_FRAME::ArchiveModulesOnBoard(): now can archive to any writable library type.
        PCB_BASE_FRAME::SelectLibrary(): is now generic for selecting a library, not just the active library.

Pcbnew: Code cleaning and bug fix in autoplace functions
Dialog exchange footprints has now a separate button to update the .cmp file, only on request.

Pcbnew: Fix a crash on exit when an item was previously deleted. Fix not working footprint exchange functions

*) Save library nickname in APP so upon module editor re-entry last is re-used.
*) Fix bug editing fp-lib-table Description field.

Show the "Description" field from fp-lib-table in pcbnew's module editor 'set current library' dialog.

columns.  DIALOG_SHIM would resize each separate usage to the same
size.  DIALOG_SHIM now supports and alternate m_hash_key in lieu
of the class name, optionally.

Pcbnew: add WIN32_LEAN_AND_MEAN define in github_plugin.cpp. Note: this define is already in use in avhttp build (Windows specific)

GITHUB_PLUGIN uses redirected URL to remove one HTTP hit time.

* Pcbnew: catch exceptions when saving changes to footprint library table.
* Pcbnew: update footprint viewer library list if open when footprint library
  table changes.
* CvPcb: update library list when footprint library table changes.
* Minor coding policy fixes.

Pcbnew: Fix incorrect bounding box calculation of texts. Only noticeable with boards conveted from Eagle, which are using other text justification than center.
Eagle plugin: filter and replace not allowed chars in FPID(-':' and '/')  by _ or -, if they are used in Eagle footprint names (otherwise, boards converted and saved under kicad_pcb format are not readable by Pcbnew).

   pass into an HTML rendering panel and otherwise look goofey.
*) Implement BOARD::Move() can call it from EAGLE_PLUGIN::Load().
*) When USE_FP_LIB_TABLE, tolerate blank nicknames in FPIDs coming from eeschema.
   See the switch for this in pcbnew/netlist.cpp as ALLOW_PARTIAL_FPID.
*) Add an assert and a try catch block to figure out that View does not
   like some eagle pcb board.  bitset::set() is getting a -1 value and firing
   an exception.

<%s> being replaced with '%s' because the former in invisible in html panels.
Cure some compiler warnings.

* Fix replace bug to handle case sensitivity properly.
* Fix replace bug where the item index was getting updated incorrectly.
* Fix replace infinite loop bug on replace all.
* Make find/replace view update code a separate function.
* Rearrange find/replace trace string to add tracing to EDA_ITEM::Replace().
* Add IsComplexHierarchy method to SCH_SHEET_LIST for future find/replace
  improvements.

Fix issues created by this patch.
Note, this fix slightly changes the vertical position of these texts.
This is not really a  problem in eeschema, but in pcbnew this is perhaps  more annoying, if the verical multiline text is critical.
Fix a very minor issue  for vertical justification of single line texts in dxf import.

more DIALOG_FP_PLUGIN_OPTIONS work, make PROPERTIES a map instead of a hashtable for alphabetical iteration.

*) Use it on 3 grids total in DIALOG_FP_PLUGIN_OPTIONS and DIALOG_FP_LIB_TABLE.
*) Fix bug when pasting "(fp_lib_table" text into FP_LIB_TABLE.