updated README
Merge branch 'master' of https://github.com/AndreasPizsa/grunt-update-json

# By Nicholas Bollweg (Nick) (4) and Vasyl Zuzyak (2)
# Via Andreas Pizsa (3) and Vasyl Zuzyak (1)
* 'master' of https://github.com/AndreasPizsa/grunt-update-json:
  docs(readme): move cli option to the end
  docs(readme) remove duplicated cli option
  fixing bad _ dep, removing unused node-unit
  initial stab at sensible defaults
  adding test for default
  adding json-path, removing implicit casting to JSON pointer

Conflicts:
	README.md