update .hgignore to ignore build, temp and config files in the ember app and the drupal module
# See http://help.github.com/ignore-files/ for more about ignoring files.
# compiled output
/dist
/tmp
# dependencies
/node_modules
/bower_components
# misc
/.sass-cache
/connect.lock
/coverage/*
/libpeerconnection.log
npm-debug.log
testem.log