Allow constants to be used to set rel100 options
Add deprecation warning for setting rel100 with a String instead of constants
Update rel100 default setting to new Constants. Thanks @joseph-onsip.
Revert "Add deprecation warning for setting rel100 with a String instead of constants"

This reverts commit 576e560d2978dc1ebf1a8fba5832bd7c70e33aec.

Conflicts:
	src/UA.js
Make constants match deprecated string values for legacy support
Merge pull request #45 from egreenmachine/issue-27

Allow constants to be used to set rel100 options