Update strings.xml

Noticed many errors still present. Started from the bottom up. Made many grammatical changes ie: spelling, spacing and edited sentences (restructured and worded to make actual sense in English)
Sorry for all work I created, having to recheck all my edits.
Merge commit '8754e77b1973119d7e79e2e71b1c454cb2979bbc'

Conflicts:
	res/values-en/strings.xml
Fixed broken \' introduced by last merge of p.chi's changes.