Removed old color and visiblity dialog
work in progress.
See also TODO, P0)

Pcbnew: fixed a double deletion that crashes pcbnew. Starting my work on net classes (moving target)

* Split out application specific command IDs to prevent unnecessary rebuilding.
* Eliminate duplicate menu and tool bar command IDs.
* Split component library editor and viewer definitions to separate header files.
* More component library and document file merge code.
* A bunch of minor string readability and consistency fixes.

Minor others changes.

Code clarification about 3 confusing functions to display info: DisplayInfo (displaying a message info) and class members DisplayInfo and Display_Infos doing the same thing (see changelog)

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

Integrate wxFileHistory, add missing header files to fix Linux build, initial search path work, and general housekeeping.