* Make defintion of OSX build target a requirement.
* Update OSX build documenation to reflect build changes.
* Update OSX build script to reflect build changes.

Add check for correct wxGTK version report by wx-config. If incorrect cmake fails. Compare https://bugzilla.redhat.com/show_bug.cgi?id=1077718

python scripting: refinement for UTF8 class (from Miguel Ángel Ajo Pelayo) add __str__  method, usefull to print a UTF8 string.
Kicad manager: fix issues in file watcher: changes (adding/removing files)  in project folder not seen by Kicad manager (perhaps due to changes in internal wxWidgets code between 2.9.5 and 3.0).

* Exit script when package install, build configuration, or build fails.
* Install each dependency package one at a time.

Python scripting: make UTF8 class accessible by python scripts. Add python method GetChars() to UTF8 class to get its char buffer.
See scripts/test_kicad_plugin.py for example.

* Fix creation of single app bundle with respect to scripting support.
* Cleanup scripting search paths for OSX.
* Fix some small CMake bugs from previous OSX build change.
* Optimize bundle file structure to be consistent with Apple specs.
* Add helper script for compiling wxWidgets and wxPython
* Update OSX build instructions.

   to a new BOARD in the footprint editor.  This is PAGE_INFO::A4 and company.
   
*) Remove static storage of the BOARD in the module editor.

*)  Implement a framework for "Data Load On Demand".

*)  Implement FP_LIB_TABLE* PROJECT::PcbFootprintLibs(), which is the first
    prototype.

This allows the project specific footprint tables to be part of the Module Editor
when invoked from Eeschema.

*)  Implement a framework for "Data Load On Demand".

*)  Implement FP_LIB_TABLE* PROJECT::PcbFootprintLibs(), which is the first
    prototype.

This allows the project specific footprint tables to be part of the Module Editor
when invoked from Eeschema.

fix also a bug in python script round_value_robin.py.

fix also a bug in python script round_value_robin.py.

kicad-install.sh: fix bad url for legacy libraries. Add the same script hich does not need a bazaar account to download Kicad (using https instead of ssh to create branches)