Code editor
[Processing] Refactoring of parameters and outputs

It also adds some changes in the core and tools package, to provide a cleaner structure
cmake: report geos version
fix warnings
more doxygen fixes
fix moc warning
[composer] Fix calculation of rotated image size inside picture items when rotation is 90 or 270 degrees.
cmake: report geos version with c-api header only (followup 0529f117)
german translation update
[TRANSUP] transifex update and common string update

Signed-off-by: Werner Macho <werner.macho@gmail.com>
Define QSCINTILLA_DLL for windows
Use code editor for expression widget
debian packaging update
[processing] fix icons for TauDEM algs
[composer] Clean up code, move some methods to QgsComposerUtils, const correctness, tests, doc improvements
[FEATURE][composer] Option for manual entry of HTML item source. Sponsored by City of Uster, Switzerland.
[composer] Fetch html using QgsNetworkAccessManager so that reply can be manipulated prior to rendering. Sponsored by City of Uster, Switzerland.
[composer] Switch to using qscintilla for html editor in html item properties. Sponsored by City of Uster, Switzerland.
[FEATURE][composer] Allow evaluation of QGIS expressions inside html item source. Expressions are evaluated before HTML is rendered, allowing the expression results to modify how the HTML content is rendered. Sponsored by City of Uster, Switzerland.
Clean up code editor code and API. Add tr() and fix spelling.

Moved show/hide folding and margin methods to base class.