Merge pull request #545 from el1073/styles_to_db

[FEATURE] Styles to db - this was approved for late submission prior to the feature freeze
[pyqgis-console] adds a find text widget to editor
Added extra advanced options for GRASS algorithm Import/Export

Modified/added some GRASS descriptions
Adjustments in DEM parameters fro OTB algorithms
Changed default cellsize for SAGA algorithms
another indention update
cleanup style to db:
- add sip bindings to new methods
- table name, sql queries and constants should not be translated
- replace QVector<QString> with QStringList
german translation update with some string fixes
more translation string cleanups
fix spelling errors
[diagrams] Usability improvements
 * Choose default attribute value for interpolation if none is set
 * Remember last used tab
 * Default for scale dependent visibility matches layer settings
[diagrams] Show message on messagebar instead of messagebox
And some indentation updates
more spelling fixes
catch system signals and stack trace on linux
html identify results: catch loadFinished only once
Update to custom CRS management
Updates to compile with current master
check validity of CRS before saving
do not use QgsCoordinateReferenceSystem internally
[sextante] added back script creation tools to toolbox