Corercted galician translations gl.js

- Corrected "Octubro" --> "Outubro"
- Corrected "fai" --> "hai". "fai" is a spanized fail. Correct example: "two days ago" --> "hai dous días" (not "fai dous días")
- Corrected "uns segundo" --> "un segundo" (number agreement)
Update gl.js
Update gl.js

Corrected "un segundo" --> "uns segundos" (a few seconds).
I realised my error in last correction after take a look and correct gl.js in test section.
Merge remote-tracking branches 'DaAira/develop' and 'DaAira/patch-1' into bugfix/gl-lang
Fix lang/gl.js so tests pass
Keep jshint happy
Moving isPM check to the language object so it can be overwritten by different languages
Ignore DST for day, week, month and year diffs
Merge branch 'develop' into feature/ampm

* develop: (21 commits)
  Fixing tests for #780
  More tests for #788
  Using first valid format when parsing multiple formats - #653 #788
  Updating tests for #788
  fixing jshint error
  Use brackets to escape characters
  Add composer.json
  fix test and some translations
  Update it.js
  Fix escaping
  Update br.js
  Fixing indentation
  Fixing indentation
  Fixing indentation
  Added mutations for years
  And more
  Update header
  More tests, more translations
  Updating header (comments)
  Updating months
  ...
Moving parse regex to language as well as isPM
Adding moment#min and moment#max #755
More fixes to Ukrainian: literary standard fix plus special case for 11 hours processing
Fixed diff across tz tests to work for all timezones
added in a toISOString helper method to match the javascript date object's toISOString method
fixed missing space after function
Merge pull request #791 from timrwood/feature/ampm

Supporting A.M. and P.M. and moving isPM check to Language
aliasing the toISOString method to the toJSON method
The only solution I can propose with processHours function
Add duration.add() and duration.subtract() methods.
And this does work indeed, thanks to guru @ichernev