Allow use of shell aliases about pathpicker

[joeguilmette]

a big +1 from me. i wouldn't go so far as to say useless without aliases, but it would be much more useful if i were able to use aliases.

[pcottle]

Alright I heard back about my approach in #59 so lets go with that! My only worry is that we source the entire .bashrc which might have side-effects. I actually use my bashrc to log onto my development server for facebook (automatically) so its kind of an aggressive script to source, but hopefully my situation is not super common.

[pcottle:~/Dropbox (Facebook)/wip/PathPicker:master]$ git show --stat | ./fpp
getting input
executing command:
ga  '/Users/pcottle/Dropbox (Facebook)/wip/PathPicker/src/output.py'

(ga is aliased to git add for me)

should work 100% for bash, and hoping zsh is the same way. can anyone test?

[langtianlang]

@pcottle Using 0.5.6. Zsh aliases did not work for me

➜  code/stuff git:(master) ✗ gs | fpp
getting input
executing command:
ga '/Users/llang/code/stuff/thing.rb'
/Users/llang/.fpp/.fpp.sh: line 4: ga: command not found
➜  code/stuff git:(master) ✗ brew upgrade fpp
Error: fpp 0.5.6 already installed
➜  code/upclookup git:(master) ✗ ga
Nothing specified, nothing added.
Maybe you wanted to say 'git add .'?

[pcottle]

@langtianlang youll have to install from master, since 0d12fef is not in fpp 0.5.6:

# excerpt from 0.5.6's output.py
def getAliases():
    try:
        lines = open(os.path.expanduser(BASH_RC), 'r').readlines()
    except IOError:

either follow the manual install instructions in the README or wait till tonight when I submit the new release :)