extend data object with data from file.data, requires extend form util
extend data object with data from file.data, requires extend form util
added tests
define data as an empty object if it is null
added gulp-data section to readme
emmit something useful when replacing a missing partial
Merge remote-tracking branch 'upstream/master'

fixed conflicts

Conflicts:
	index.js
fixed a issue where the data object was being referenced instead of
copied
Add file data to _data