Add documentation for ejs partials

We need to show the documentation for how to load partials when using ejs. As according to the default ejs partial syntax, the usage here is slightly different due to the use of ejs-locals and thay may not be immediately apparent to end users.
Merge pull request #281 from luckysmack/patch-1

Add documentation for ejs partials
Fixed a typo yout->your.
Merge pull request #282 from InconceivableDuck/master

Fixed a typo yout->your.
Update DefaultTasks.md

may be  a spelling mistake
Merge pull request #283 from tsq/patch-1

Update DefaultTasks.md