Additional Changes for Challenge 2732

I've fixed the issues that I had discovered in iCare's submission and mentioned here - https://github.com/docusign/DocuSign-eSignature-SDK/pull/44#issuecomment-23544411

I added these validations on senddocument page

1. Required field validation on subject.
2. Required field validation on Email.
3. Required field validation for RecipentName. (if only one)
4. Required field validation for RecipentEamil. (if only one)
5. Required field validation for RecipentName and Eamil if more than one
6. Required field validaiton for if no document selected

I added these validations/ fixes on sendtemplate page

1. Required field  validation on subject 
2. Required field  validation on Email
3. Disable post until the user does not select a template and hit the go button
4. Required field  validation for RecipentName 
5. Required field  validation for RecipentEamil
6. Custom alert messages for all validation messages.