Eeschema: Add hotkey 'U' to edit reference. Better filtering for  hotheys V, F, U: now the corresponding field is selected without selection list between component and the field.

* Add check box and flag to ignore replacing the component reference
  designator field.
* Fix a resizing bug when switching between the find and replace modes of
  the find/replace dialog.
* Fix replace component reference designator field bug.
* Force rebuild of search list when schematic is modified and the replace
  dialog is closed.
* Prevent finding the next item when the find/replace dialog is closed.
* Respect warp mouse pointer setting when closing find/replace dialog.
* Fix duplicate mnemonic control accelerator keys in find/replace dialog.

* Enable replace toolbar button and menu entry.
* Improve find replace logging granularity.
* Fix find and replace dialog control hiding and disabling.
* Minor improvements to the SCH_FIND_REPLACE_DATA object.
* Move find collector list iterator into the collector object.
* Add visibility override flag to EDA_ITEM to temporarily show items that
  are hidden during find and replace.

* Replace Eeschema find code with a collector based implementation.
* Fixed a search bug when all subsequent searches of an item would ignore
  the remaining valid child items when an item had more than one child
  item that matched the search criteria.
* Add SCH_FIND_COLLECTOR class to find all items that meet the specified
  search criteria.
* Add SCH_FIND_COLLECT0R_DATA to keep track of information for all matching
  items.
* Use collector to iterate over the list of items that match the search
  criteria rather than trying to start at the last matched item.
* Remove unused searching methods from sheet path and sheet path list
  objects.
* Add replace and replace all functionality to Eeschema find dialog.
* Push matching methods down to EDA_ITEM class so they can be used by
  other derived objects.
* Add method to EDA_ITEM to test if item supports replacing.
* Add flag to find/replace data to support replace feature.
* Disable wild card matching check box when dialog is in replace mode as
  wild card replacement is not supported at this time.
* The usual Doxygen comment and coding policy fixes.

* Create command event handler for orienting schematic items and block.
* Remove redundant orient item and block command handler code and IDs.
* Remove redundant cancel current command event table entry.
* Remove unnecessary schematic bitmap object virtual functions.
* Set path when saving schematic sheet files to prevent assertion in
  updated path and file write permission test function.
* Restore directory and file name write permission test function to it's
  previous behavior to prevent unexpected save results.
* Add an assertion to verify the path is not empty to directory and file
  write permission test function.
* Improve documentation for path and file write permission test function.
* Fix Doxygen link warnings.

* Correct all user strings and comments for the correct capitalization of
  application names according to JP.  They are KiCad, Pcbnew, CvPcb,
  Eeschema, and GerbView.
* Add a note the the user interface policy about the correct capitalization.

eeschema: add SCH_SHEET_PIN_T in ParentItems collector, convert sch_collectors.* to native unix format

* Add drag context menu entry for junctions that actually form a junction
  with wires to EESchema.
* Add function to test for junctions to SCH_COLLECTOR class.
* Create annotate type and sort order enums to eliminate magic numbers
  used in annotate code.
* Remove duplicate Doxygen comments from annotate.cpp and improve the
  actual Doxygen comments in wxEeschemaStruct.h.

* Remove specialized edit reference, value, and foot print field methods
  from SCH_FRAME object.
* Improve general field method to handle all field types as this was
  essentially the same code used in the three methods removed.
* Updated the the hot key and context menu handlers to use the new field
  edit method.
* Minor Doxygen comment warning fixes.