check for module before window for browserify support
Merge pull request #41 from mikefrey/browserify

Browserify Support
Merge branch 'master' into develop

A few pull requests were merged accidentally in master, so put those in
develop. I'll revert them in master aferwards.
Use zone(z, false) to set the zone without adjusting time

This is related to https://github.com/moment/moment/pull/1468
Merge pull request #61 from ichernev/use-zone-skip-adjust

Use zone(z, false) to set the zone without adjusting time
Use new zone api for keeping the time
Merge pull request #70 from ichernev/update-zone-api

Use new zone api for keeping the time
Set _z in momentProperties
Merge pull request #71 from ichernev/fix-cloning-moments

Set _z in momentProperties
Add moment.tz.zoneExists

Requested in https://github.com/moment/moment-timezone/pull/48
This function returns whether the given zone name exists or not.
Merge pull request #73 from ichernev/zone-exists

Add moment.tz.zoneExists
Prevent double loading of moment-timezone plugin

Reimplementation of #31
Merge pull request #74 from ichernev/prevent-double-loading

Prevent double loading of moment-timezone plugin
Bump dev dependencies versions
Use ISO format when creating test moments
Bump version of moment to 2.6.0
Bump version to 0.0.4
Merge branch 'develop'

Conflicts:
	moment-timezone.js
	tests/manipulate.js