Add support for tagging and untagging users
Adding Intercom::Tag.find and find_by_name
Updating version and changes
Merge branch 'master' into user-tagging-refactored

Conflicts:
	changes.txt
Add parameter to specify op and update example
Adding ability to shovel users into tagging/untagging op
Merge pull request #22 from intercom/user-tagging-refactored

User tagging refactored