chore(syntax): update all other specs to the new syntax
fix(onPrepare): onPrepare with a string argument should resolve from the config directory

onPrepare can take a string, which is a filename containing a script to load adn execute
before any tests run. This fixes the string to resolve the filename relative to the
config file, instead of relative to the current working directory where protractor
is called.
chore(syntax): update example files with new syntax
docs(syntax): documentation updates to go with new syntax