add a link to the github in the navbar
enhance website for mobile
Update ACRA description

See #24
Library dir must be imported at first. See #15
add social buttons
remove old twitter buttons
add view pager
Update ActionBarSherlock documentation with the 4.2.0 version
add roboguice
fix bug about AA and roboguice rules
Update ACRA documentation to the 4.4.0 version
Merge pull request #46 from ThomasFondrillon/update_acra_documentation_4.4.0

Update ACRA documentation to the 4.4.0 version