added information about using different GPS devices and notes about
using Bluetooth units for live tracking
fix link to changelog website for 2.2
Merge pull request #222 from alexbruy/manual-gps

added information about using different GPS devices and notes about using Bluetooth units for live tracking
updated 2 chapters and started updating supported_data.rst
Users Manual Screenshots - QGIS GUI
Users Manual Screenshots - Working with projections
Users Manual Screenshots
Merge branch 'master' of https://github.com/SrNetoChan/QGIS-Documentation