updates
corrected error
updated qgis_configuration and added new advanced digitising functions to editing_geometry_attributes
added two new icons
inserted new icons and described functions advanced editing
described QGIS one to many relations
fix some spelling
User manual Screenshots - Raster Properties
Copyediting review through working_with_gps
Merge pull request #217 from SrNetoChan/master

User manual Screenshots - Raster Properties
inserted info about 20 last used expressions into working with the attribute table
Merge pull request #218 from qgis/emb_edits

Copyediting review through working_with_gps
update copyright year
removed screenshots about raster transparency and insterted new screenshots about raster properties
corrected text formatting
Users manual Screenshoots update - working with vector
Users Manual one to many relations screenshoots
Users Manual Vector Dialog Field widget
corrected rst-Expressions, inserted split parts icon and started with QGIS GUI
Users manual Screenshoots update - working with vector