Address some sublime2 compatibility issues found by @ariswang92

Merge pull request #48 from jason-kane/glob_ignore

config to ignore yapf-on-save based on wildcards

Merge pull request #44 from jason-kane/split_popen_cmd

Split popen cmd

Merge pull request #41 from jason-kane/find_yapf

Check common locations for yapf and persist to settings

Add menu entry for README

Run yapf

Merge pull request #33 from mikelambert/master

Support project config overrides.

Merge pull request #25 from gwelymernans/master

The --verify flag is only meant for debugging purposes

Merge pull request #21 from jason-kane/dont-use-stdin

Revert to passing an input filename by default

default settings wasn't using right directory

now we find out if spaces in the directory name is actually working correctly on mac and windows.