[dualview] Fix add/delete crash and fieldcalc behavior of feature form
[dualview] Default preview text shows also up for NULL values
[processing] modified saga checking to support 2.0.8
[processing] improved script edit dialog
[processing] added extent as output type and made it available in modeler
[processing] modified saga ids description and fixed example script bug
[processing] improved handling of output files and file naming
added scintilla based editor to R scripts editor
[processing] fixed bug when editing help of example models
Merge pull request #860 from Cracert/master

Polish translation update
[dualview] Remove unrequired connect()
update french translation
[gui] Address situation where applying style enables deprecated labels
Merge pull request #861 from Jean-Roc/traduction_ui

update french translation
translation update: es by Carlos
pl translation update; function_help