0.6.9 Version Rollover
Added radio static audio loop to radio-lesson app
Add beginning of multiuser example app
Update lesson recipe with information about multiple levels of tasks. Fixes #1828.
Got multiuser example app working

refs #1711
Update multiuser.md to match multiuser example app

fixes #1711
Add info about Alt+click to simulation.md and resize image

fixes #1818
Allow user to rotate in multiuser app
Add new radio lesson sound to alleviate issues with the HTML5 audio tag. Fixes #1783.
Fix lighting in multiuser/index.vwf.yaml

refs #1711
Simplify multiuser example app code and add explanatory comments
Update multiuser.md to reflect comments in code

refs #1711
Break radio lesson application into lesson and radio components. Refs #1817, #1842.
Update driver config to handle drivers it doesn't know about without failing. Move browser compatibility checks into the kernel and drivers, so that they are only performed if they are needed for the application.

Fixes #1850, #1853
Fix config files to handle drivers it doesn't know about without failing.

Refs #1850
Add 2D tile puzzle app.

Fixes #207
PhantomJS integration of gem into baseline
PhantomJS integration of gem into baseline refs #1595
PhantomJS integration of gem into baseline refs #1595
Prevent the jsdoc filter from generating a comment closing its own block.

`/////...` was being converted to '/**//...' and causing a syntax
error. Now, any `*/` sequence in the resulting comment is converted to
`* /`. Also, only comment lines starting with exactly three slashes
are considered to be jsdoc comments. For ruby-style comments in YAML
files, jsdoc blocks must start with exactly two hash characters.

Closes #1874, #1884.