added the ability to call a specific method within the sandbox
passed methodName to timeout callback
fixed an error if the buffer represents a undefined variable
Updated README (added "Run functions independently")
Merge remote-tracking branch 'upstream/master'

Conflicts:
	lib/sandbox.js
Merge branch 'master' of https://github.com/bcoe/sandcastle

Conflicts:
	lib/sandbox.js
added independent function call test
a few minor changes to independent functions pull.
fixed README
added independent function calls with shared api and individual globals example
white-space fix.
Merge pull request #32 from bcoe/independent-functions

Merging Independent Functions Feature