[apps/cgsee]
 - added screenshot function #12
[libs/gui]
 - added screenshot signal/slot and action #12
[apps/cgsee]
 - added save as dialog for screenshots (#12)
ref #12 simplify frame capture code
ref #12 add aspect ratio option
ref #12 encapsulate image export dialog handling
* test for referencing issues
[apps/cgsee]
 - moved camera to AbstractPainter in libs/gui
 - moved capture feature from cgsee/painter to libs/gui/canvas
 - tile size set to 1024x1024 pixels
 - fix and close issue #19
ref #12 extend image export dialog to add options (image size, aspect ratio, ...) in the future
ref #12 fix build
ref #12 add cancel support
- ref #12 add QFileDialog derived class
Merge branch 'master' into basic_screenshot_module_12
* fix #1* fix #122
Conflicts:
	apps/cgsee/painter.cpp
ref #12 start on new export gui
ref #12 start canvas export configuration
* add size functionality to export gui
* change ownership and interface of exporter (used now in viewer)
* add short keys for screenshots
* add advanced option to viewer
ref #12 export gui way works
* fbo resize does not work again
ref #12 fix capture
* introduce new interface to solve resize issue fixed in #19
* disable continous updates
ref #12 make presets workin
ref #12 add full restore support
* restore last config if custom
* restore last preset
* differentiate advanced caputure from direct capture
* increment filenames on direct capture
* resolve missing settings on first usage
ref #12 fix cmake (NOTE: you need to adjust your config now...)
* include the qtbase or msvc2012_x64 part within the QT_DIR
* plus fix for windows platform error
fix #35 add and bind action for global shader update (works)