Rename copy-to-r to copy-to-r! in test
Merge branch 'develop'

* develop:
  Rename copy-to-r to copy-to-r! in test
Update README.md
Update README.md
Switch out to Cosmo for vanilla bootstrap for now
Make container fluid (more app-like)
Minor styling clean-up 

& reindent html
Adhere to some code conventions
Directly use function instead of wrapper
Strip the exception header if the cause is an REngineException