Added missing files in getting_started CGT example
Merge branch 'pre120beta' of github.com:mvukov/acado into pre120beta
CGT: weighting matrices names changed:

- S -> W, generated in acadoVariables
- SN -> WN, generated in acadoVariables

This is deliberately done because Simulink coder
is not happy with structure fields with name "S".

This is not backwards compatible and it is going
to break old codes.

Generator changes are only in ExportNLPSolver
class. Examples and Matlab+Simulink interfaces
are updated accordingly.
Udated documentation

- Added the new logo
- Added CGT getting_started example
- Updated wiki
- Removed tree view from oxygen
- Added citing page in wiki
- Updated wiki pages here and there :)
Simplified the CGT getting started example