docs: clarify that gcc-4.7 is required for Android builds
Remove unset but used variable
[fix] KaiTaost display of "next subtitle" was always one behind
[jenkins] - our minimum deployment target for ios is 4.2 not 4.1
cosmetics: remove unused old code from CGUIWindowSettingsCategory
[docs] - exchange libshairport with libshairplay in the linux readme
Merge pull request #2702 from Rawk/remove_unset_but_used

Remove unset but used variable
Remove AddFileFolder(..) without return value
Merge pull request #2704 from Rawk/use_return_value2

[Cosmetic] Remove AddFileToFolder version without return value
Merge pull request #2705 from Voyager1/fix-nextsub-message

[fix] KaiToast display of "next subtitle" was always one behind