Added some api endpoints

Everything under “Templates” in our API documentation is now
implemented:
- List templates
- Get specific template
- Get specific template+version
- Update template version
- Create new template
- Create new template version
Made a booboo
Upped version
-adding methods for grabbing logs
-adding methods for grabing segments and running a segment
Add .templates() in place of .emails().
Move /emails to /templates. No longer use deprecated /emails endpoint.
Bump version.
Merge pull request #14 from sendwithus/add-templates-api

Add .templates() in place of .emails().
Merge pull request #13 from agrunewald-va/feature/logs-and-segments

Logs & Segments via API Client
Ensure file handle is closed using with statement
Merge.
Remove .emails() from README examples (DEPRECATED).
Merge pull request #16 from sendwithus/feature/finer-template-control

Feature/finer template control
Merge pull request #15 from svisser/patch-1

Ensure file handle is closed using with statement
Bump version.
Merge branch 'master' into feature-drips-2.0-update
update version