First attempt at Transifex support

Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
README: Add Transifex link

Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
res: Delete a bunch of unused strings

Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
lint: Delete a bunch of unused resource files

Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
lint: Delete reference to obsolete VPNPreferences activity

Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
lint: Explicitly specify LinearLayout orientation

Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
lint: Clean up minor strings.xml warnings

Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
lint: Remove more unused files

Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
res: Delete more unused strings

Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
res: Update translations

Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
CommonMenu: Add "Help with translations" item

This sends the user to the ics-openconnect page on Transifex.

Signed-off-by: Kevin Cernekee <cernekee@gmail.com>