[Qt-creator] Cmake parser

[Daniel Teske]

> I made small changes in CMakeProjectManager plugin, main:
>   * Project file list readed from file system instead of parsing .cbp
> (CodeBlocks) project file.
>     It can be slow on big projects, but reloading initiating only
> during open project, run CMake,
>     or user-initiated tree changes (add new files, erase files, rename
> file)
>   * You can add new files from Qt Creator. Note, you can create file
> outside project tree,
>     but Qt Creator will display only files that present in project
> tree. Also, you should
>     manualy describe this files in CMakeLists.txt.
>   * You can rename files in file system from Qt Creator now.
> 
>   * You can erase files from files system from Qt Creator now.
> 

Well doing hat does have the advantage of also showing all the header files.

On the other hand:
- It shows unrelated files that are not part of the project
- The add/remove/delete functions not updating the CMakeLists.txt is not 
right, that is just confussing for the user.

daniel