chore(release): fix Travis configuration so that sauce tunnel is properly passed
fix(launcher): make child runner environments inherit from main environment
docs(browser-setup): Update PhantomJS Setup Info

-Added information about passing CLI arguments to PhantomJS

Contributes to #150
docs(browser-setup): add notes about multiCapabilities
refactor(launcher): make launcher use child process messages instead of messing with the env
docs(debugging.md): fixed screenshot sample code
docs(debugging): fix typo and command to start element explorer
chore(release): changelog and version bump for 0.19.0
chore(release): fix changelog typo from 0.19.1 to 0.19.0
chore(release): changelog styling
fix(configParser): load coffee and typescript for child processes

Without loading coffee in configParser.js, child processes which
try and load a coffeescript config file do not have coffee
registered with node's required, and child tests fail.

Fixes an issue with using coffeescript config files.