removing arbitrary hellosign field lenth limits

Conflicts:
	hellosign/hello_objects.py
	setup.py
adding in method for creating a signature request from a template

Conflicts:
	hellosign/hello_objects.py
	hellosign/hellosign.py
switching validate to call the two separate validation methods
Merge pull request #1 from ephemerallabs/fixes

Allowing for templates, fixed one bug, making validators longer