Update nn.js

Change the long date format, so that it follows the most common Norwegian system for dates (DD.MM.YYYY). Ref. http://en.wikipedia.org/wiki/Date_and_time_notation_in_Norway.
Update nn.js

Update test for nn
Fixed local formatting tokens detection

According to the docs:
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/test
issuing regex.test on the same regex that is also g (global), would cause it to
remember the last match position and continue from there. Set lastIndex to
0 before every test to make sure this won't happen.
Merge pull request #971 from ichernev/bugfix/global-regexp-test

Fixed local formatting tokens detection

Apparently global regexes remember the last matched position after `test`. Reset that that before each test.
removing extra s in get() and set()
Added unary + operator to ms, days, and months in Duration constructor
when building internal representations
Added tests that check against string initialization of Duration
parameters
Closes #968
Split string value tests into their own test
Merge pull request #979 from chall8908/develop

Fix for strange Duration behavior when using strings for values
Merge pull request #978 from icambron/extraneous-s

removing extra s in get() and set()
Merge pull request #966 from mechuwind/patch-1

Change the Norwegian nynorsk language configuration to follow the most common date format