Change object construction to prevent Chrome v32 crashing.

Suspected JS execution optimizations in v32 is causing the browser to
throw "Aw, Snap".

See https://github.com/moment/moment/issues/1423
Merge pull request #1429 from thebestday/bugfix/chrome-v32

Change object construction to prevent Chrome v32 crashing.

@changelog
@section bugfix
Bump version to 2.5.1
Workaround safari bug

13 March 2011 is not handled properly in Safari. Detect bug and exit
test early.
Merge pull request #1441 from ichernev/bugfix/workaround-safari-madness

Workaround safari bug

@changelog
@section bugfix
@description Fix #1161 by detecting safari bug and skipping test