Update spanish translation
Suggested change in spanish translation

I suggest this change because the word "cell" may be more ambiguous,
while "mobile Anteas" I think it is more appropriate in the context of
the app.
Update strings.xml
Merge pull request #387 from rodmoreno/master

Update Spanish translation
translate strings about wifi
Merge pull request #391 from CupIvan/patch-1

translate Russian strings about wifi
Poland Koleje Slaskie train hotspot blocklist
Stylistic changes + new Polish strings.
Merge pull request #392 from merkato/master

Poland Koleje Slaskie train hotspot blocklist
Merge pull request #393 from tamcap/master

Stylistic changes + new Polish strings.
Cleaning up the error output of MainActivity.java
As requested by @cpeterso.
Merge pull request #394 from tamcap/master

Cleaning up the error output of MainActivity.java
Decrease scan report watermark count to reduce memory usage
Don't log empty response if server returns HTTP 204 No Content
Allow nullable mGpsPosition so we don't need to track mGpsPositionTime separately
Separate Wi-Fi and cell report generation
Merge pull request #395 from cpeterso/cpeterso/refactor-reporter

Refactor reporter to reduce memory usage
MozStumbler v0.12.0
Merge pull request #396 from cpeterso/v0.12.0

MozStumbler v0.12.0