Merge pull request #22 from bdupras/master

Adding contribution instructions
Updated nock to work with node 0.10
Allow the Rally host to be specified through a command line switch.
Merge pull request #24 from aesterline/make_rally_host_configurable

Allow the Rally host to be specified through a command line switch.
Merge pull request #23 from aesterline/upgrade_node

Updated nock to work with node 0.10
Fix colors on light backgrounds.
fixed order of parameters of the task command.  Fixes #1.
Merge pull request #26 from bdupras/task_command_fix

fixed order of parameters of the task command.  Fixes #1.