Merge pull request #2 from vaneyck/master

Warning is logged if sync and async mixpanel events are not defined in Config.groovy
Rolled version number for 1.0 release.
Rolled version number for next development iteration.
Updated mixpanel java library to latest release (1.1.2).
Udpated mixpanel lib to 1.1.3
Added option to disable event delivery in development.
Made mixpanel events disable on client-side when simulate mode is enabled.
Fixed test for simulation config check in MixpanelTagLib
Merge pull request #6 from lesiki/patch-1

Fixed test for simulation config check in MixpanelTagLib
Fixed call to instanceof referencing primitive type.
[RELEASE: 1.1]
[POST-RELEASE 1.1 -> 1.2-SNAPSHOT ]
Fixed bad object conversion to JSONObject