Added a using function for specifying the sync manager.
Added a faster nextTick
Added underscore as a third party lib
Some fixes in the skeleton files
Updated to use new syncManager in using module
Some minor changes in promises
Several promisifications
check that prevNext is defined
Moved nullifying of currentTransfer to the end of the function for easier debugging.
Associated inserted: event to update instead of add
Added a promise map function.
Promisified collection, sequence and model.