Overhaul

This PR adds:
* An Updated Readme
* A Basic usage message to the usage command
* Changing of comments that reference 'uf' to now say 'pear' in ```./pear```

![pear1](https://cloud.githubusercontent.com/assets/2591516/3470345/6d9221ba-02b9-11e4-9265-d291a3e2970b.gif)

for now, i'm ok with it being coupled this way. i mean, there has be coupling at SOME level, doesn't there? 

how else are the executables supposed to access the .git directory?