Added --head option (which, if true, assumes --input is the top-level ES root, and appropriately appends each element's index onto the URL)
Added support for bulk indexing (using --bulk=true option)
changed 'head' parm to 'all' ... added tests, updated README
Merge pull request #6 from mmoffitt/master

Added --head option (which, if true, assumes --output is the top-level ES...