Mention proper "404" function in docs.
Update the git location to be current, rename all instances of Play20 to playframework,
update more docs where Play20 should be replaced with playframework
Point CONTRIBUTING.md to make new issues in Github rather than lighthouse
Merge remote-tracking branch 'upstream/master' into patch-2

Conflicts:
	README.md
Upgrade junit-interface to 0.10. Fixes several bugs compared to 0.9 such as swallowed test failure information and problems with junit runners
Hooked router cache into Play lifecycle to prevent classloader leaks in dev mode
Merge pull request #1406 from benmccann/junit-interface

Upgrade junit-interface to 0.10.
Merge pull request #1402 from jroper/router-mem-leak

Memory leak
Merge pull request #1335 from gphat/master

Fix mention of "404" handler in GlobalSettings
Merge pull request #1354 from wsargent/patch-2

Change the Play20 name to playframework at github