Update strings.xml

Fix some redundant/confusing strings
Update strings.xml

User doesn't needs to know this. I think
Some string fixes

...And spanish translations

Conflicts:
	res/values-es/strings.xml

Change-Id: Icdd702d99c5ca4cf8fa3b20cc1d95920286cfddb
Add missing string

Derp, thanks BigBrother1984 for spotting this one
Conflicts:
	res/values-es/strings.xml

Change-Id: I534cfc4514f2eababa7670125a54445dafefb1c2
First half of italian translations