Update strings.xml

Updated translations to match options more precisely
Merge pull request #91 from Trollmen/patch-1

Update strings.xml
Refactor image parser, update relink image logic

Relink Image Logic updated to check if the original img doesn't exists
and the new img is exists.
Change MainActivity buttons when clicked or focused
Remove hard coding of button pressed colors
Merge pull request #92 from liyhcharles/master

Buttons now change color when clicked or focused