simplify SMS code
clean up and standardize all files within sms/
fix some go vet complaints
standardize more
Merge branch 'master' into refactor

Conflicts:
	.travis.yml
	account.go
	conference/fixtures_test.go
	examples/modify_conference/main.go
removing whitespace in imports
remove uncessary mock server in tests
Merge pull request #51 from natebrennand/refactor

Refactor SMS