made the root task a _dependency_ of the frame - this allows the user to call ac.assets.** and access the <head> tag before it's too late
setting only instance properties that are not undefined - this is useful for later processing by Y.mix with non override
merging
Merge branch 'master' of github.com:jarnoux/mojito-pipeline
Revert "made the root task a _dependency_ of the frame - this allows the user to call ac.assets.** and access the <head> tag before it's too late"

This reverts commit 618363013c568c973e482e866d95143f2b0235a9.
Merge branch 'master' of github.com:yahoo/mojito-pipeline
Merge branch 'mixfix' of github.com:jarnoux/mojito-pipeline into mixfix
fixing mix - one argument was missing
Merge pull request #15 from jarnoux/mixfix

Mixfix