Added statistics functionality (APIv2 only)

https://www.hipchat.com/docs/apiv2/method/get_room_statistics
added Room#update_room method, specs, and docs

https://www.hipchat.com/docs/apiv2/method/update_room
Allow multiple rooms to be notified with the same message
Suggest using room name or id for more robust configuration
Room config is an array now
Merge pull request #103 from seafoox/feature-apiv2-statistics

Added statistics functionality (APIv2 only)
Merged Perceptive-Cloud-update_room, resolved conflict
Merge branch 'Perceptive-Cloud-update_room'
ignore intellij
Merge pull request #110 from joraff/chef-mods

Chef mods
Merge pull request #106 from sonyakc/master

Allow multiple rooms to be notified with the same message
Fix for variable scope in chef handler
Reorganize chef handler options
Merge branch 'chef-mods' of https://github.com/joraff/hipchat-rb into chef-mods