Update README.md

add git submodule update
Merge pull request #22 from elsigh/patch-1

Update README.md
Adds basic caching for commonly accessed keys
Removing use of cache
Use locking on tasks
Cache jinja templates
Updating sub projects
Adds blinker library for flask signals
Removes session cookies from cached responses using a supported flask API
Changed decorator to put build in flask globals
Adds flags for capture and pdiff retries, phantomjs timeout
Don't report dirty blinker module status
Splitting out workers into multiple module files
Fixing timer thread
Got WaitAny for workitems to work
Added fire and forget for workflows
Wait any exception raising is working
Added test for fire and forget child workflow
Added tests for fire and forget with wait any and wait all; test for wait all
Fixed test