* Fixed a typo where 'ls' was 'cat'
'ls' was written as 'cat' in the usage pane. Also made some grammatical changes and changed the location of the directory usage example.
* Update index.md
I fixed a typo where the usage showed cat rather than ls.
I removed a reference to *master on someones command line example that included a fancy shell hook that shows which git branch you are in (most people won't have that).
