Added an experimental tool to create logos from .bmp bitmaps. Added Potrace library to convert bitmaps to polygons

* Fix a minor problem with wxFileDialog to open a file that no longer
  exists in PCBNew.
* Make GerbView open file behavior the same as PCBNew.
* Remove redundant PCB file wild card definition.
* Add open file refactor task to the todo list.
* Fix some minor code formatting issues.

Set minimum cmake version to 2.6.4. Added footprint name edition in the module editor dialog properties.

preparing auto refresh of the 3D view in mod edit (not yet working)

* Closes bug report 570021.
* Removed unused variable from pcbnew.cpp
* Use new message box methods when saving board file.
* Minor code cleaning.

* PCBNew remembers last net list read during the current editing session
  as well as between project editing sessions.  Closes bug 576902.
* Separate PCBNew application settings from project file settings and
  allocate them dynamically instead of statically to make it easier to
  eliminate global variables.

Pcbnew: Fixed minor problems (bugs 568357 and 568356). Changed French word COTATION to DIMENSION in class COTATION (now class DIMENSION)

fixed others very minor bugs.

* Add CMake script to generate DSN token header and source file from
  token list file.
* Add preliminary component library DSN token list and lexer file to
  test script and prepare for new component library file lexer.
* EESchema: right click on ERC check mark displays error in message panel.
* Remove PCBNew header file dependency from common DSN lexer source.
* Minor code clean ups.

Fixed bugs 2981754 and 2981759 (PCBnew crash when trying to add a new net name to a pad) Linux specific, and perhaps due to a bug in wxGTK 2.8 (does not happen in 2.9)

of the S_SEGMENTs were not all the same, the specctra PATH points would 
come out wrong.

Pcbnew: Fixed an issue in GERBER file creation, under Vista and W7 only for non administrator users
Plot files were 0 byte length.
This was due to use of function tmpfile() in a GERBER function to create a temporary file that seems not working using mingw.
Replaced by more usual files functions.