fixed comment referring to previous incarnation of this project
Adding checks that everything has been initialised properly, closes #5

Attempting to run scripts before initialising led to a weird error, and
trying to clean up before initialising broke things too. This commit
fixes that.
Removed dependency to phantomjs npm module

Ectoplasm is only a bridge. It should really be up to the users
to decide which version of PhantomJS they're going to use.
bump to 0.3.0