Merge pull request #2 from melnicki/master

Fixed JSON typo for Timer events
let's use aws-sdk !
Use aws-sdk for AWS HTTP calls
Importing activities from aws-swf activities
Make all activities registered on the domain available as methods in the decider code => much simpler decider code !!
Example with methods from activity names
README with pointers to the wiki
More doc in the wiki
Readme
readm
readme
Adding missing activities from aws-swf-activities
some more activities
experimental mturk activity
Support for multiple activity types in a single node package. fix #3
adding private: true in packages descriptions
Fix config fetching for multi-activity packages
sleep delay
ec2 modules
Moving workflow examples