Merge pull request #8 from astagi/master

First attempt to fix crash in case gapps missing
Added Polish translation
Update spanish translation

I'm not sure about the accents, I left them verbatim (e.g. "Más") but I think I should replace them with XML encodings (sorry, XML newbie here).

Also, this has "issue" translated as "tema", while I think it should be "edicion" or "número" but I don't have an Android phone/tablet to test the funtcionality.
Restore settings_about

I removed the wrong line :/
Merge pull request #10 from scibi/master

Added Polish translation
Merge pull request #11 from richarson/master

Update spanish translation
Update strings.xml

Just some minor spelling fixes.
Merge pull request #12 from Jatiba/patch-1

Update strings.xml
strings.xml in simplified chinese.
Merge pull request #13 from bearzk/master

simplified Chinese
french translation
Merge pull request #15 from lc3t35/master

french translation
Update strings.xml
Merge pull request #16 from fpicarougne/patch-1

Update strings.xml
added greek strings
Merge pull request #17 from Kosmas/master

added greek strings
Update strings.xml

Traduzione in Italiano
Merge pull request #18 from fatbenz/patch-1

Update strings.xml
Fixes on translation merging