refactor fTools algorithms
edited grass and saga algorithm descriptions
Merge branch 'master' of https://github.com/qgis/Quantum-GIS
Merge branch 'master' of https://github.com/qgis/Quantum-GIS
Merge branch 'master' of https://github.com/qgis/Quantum-GIS
Merge branch 'master' of https://github.com/qgis/Quantum-GIS
improvements for handling tables