Merge pull request #2 from AIFDR/develop

Merge upstream
Use QTextBrowser for Supporter tabs and set as external link.
Merge branch 'develop' of github.com:akbargumbira/inasafe into develop
Changed the name of QTextBrowser to supporters_text.
screenshots update
[HOTFIX] Fix #855
Merge pull request #856 from akbargumbira/inasafe-855

[HOTFIX] Fix #855
Merge branch 'develop' of https://github.com/AIFDR/inasafe