Flexibility to have multiple hipchat configs

Please refer: https://github.com/sensu/sensu-plugin/issues/66

Currently, the handler assumes that there will be a json file which will have "hipchat" as the top-level key in the json. Due to the same, we can only have one hipchat configuration for using with hipchat.rb.

The above changes the behavior by taking in an optional config json top level key name while invoking the handler (Instead of "hipchat.rb" you invoke "hipchat.rb --jsonConfig <config top level key>" as the handler command).

In this way, we can have multiple handlers defined with different hipchat configurations such as different hipchat rooms or different from fields.

Note: As it is an optional parameter, it will just work fine with the existing hipchat.json method (Backward compatible :) )
Removed trailing whitespace.
Fixed review comment around variable name change.
Changes to have multiple mail configs
Replaced tabs with whitespace
Setting resp.body.size to 0 if there is no response body
Add --short_output option

--short_output restricts the output to only the highest alert per target
returned
Style cleanup
find a file by regex
support regex in filename
added regex for filename
Add Hubot handler for sensu
Added Hipchat extension
Fix syntax error in hubot.rb
added google spreadsheet plugin.(fixed)
Add a check for chef-server
Add RabbitMQ Alive check against STOMP
Update header block
Merge pull request #807 from tas50/master

Add a check for chef-server
Merge pull request #808 from aashley/master

Add rabbitmq-stomp-alive check