Update Makefile tasks to build standalone
Update Makefile tasks to build standalone

Create a 'release' directory to house all the released versions of
Flight.

* Each new version of flight will have its unminified and minified
  variants added to the 'release/{{version}}' directory.

* Historical archive of previous versions will be retained.

* Latest published version will always be available in 'release/latest'.

david84/flight,flightjs/flight,margaritis/flight,giuseppeg/flight,icecreamliker/flight,Shinchy/flight,KyawNaingTun/flight,robertknight/flight,robertknight/flight,flightjs/flight,joelbyler/flight,joelbyler/flight,david84/flight,icecreamliker/flight,Shinchy/flight,KyawNaingTun/flight