Create strings.xml

With fixed closing tag ; )
Add spanish translation
show alert if gps is turned off
Fix spanish translation

For the pull request #180
Merge pull request #180 from freekzy/check_gps

show alert if gps is turned off
Merge pull request #179 from rodmoreno/master

Add spanish translation
Merge pull request #176 from ireun/patch-2

Create strings.xml
Disable map button if fake google api key found