Documentation for NSRailsModel and NSRConfig

NSRailsModel documentation

Change wording in documentation

Documentation for NSRConfig
Add another index.html for documentation
Drop support for non-ARC build since SBJson doesn't even support it
Improved grammar in readme.
removed unused rails image
Merge pull request #2 from djones/master

Improved grammar in readme
removed objective-c style comments from css file and improved spacing
use newer rails 3 style methods for validation
tidy up extra whitespace
add index to relationship column
Merge branch 'master' of github.com:djones/nsrails
Merge pull request #3 from djones/master

Performance, syntax and whitespace improvements to server application
Replace demo server app with the one running live
Fix typo in Rails app: validate to validates
Methods accepting NSError** return whether or not successful; Local changes on remoteFetch is now in parameter
Update documentation, including the new remoteFetch:changes:
Link to documentation in readme
Change [self init] to [super init] in initializers to prevent possible recursion
Cleaner error handling
Better demonstration of error handling in demo iOS app