WMS Tile retry feature
better message logging for WMS retry
Merge remote-tracking branch 'upstream/master'
Merge branch 'master' of https://github.com/qgis/Quantum-GIS
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
Merge https://github.com/luipir/Quantum-GIS