initial support for php app engine apps
merged with testing
placing php install in /usr/local
merged with shatterednirvana/multithreaded-dev-appserver
correctly passing in php executable path only on new dev_appserver
only starting one apichecker and one appdashboard, instead of three, now that they are multithreaded
merged with org/testing
removed diff conflicts
reverted back to three dashboards
Merge pull request #510 from shatterednirvana/php-app-engine-apps

initial support for php app engine apps