[Stargate] Unable to delete column families

When trying to delete a column family using Stargate, the following occurs (curl command + Stargate logging):

> curl http://localhost:8080/books/ff417a5b-c4d0-4a43-b1c7-94c356fe0b72/attribute/5426359469582345882 -X DELETE
—
10/01/13 18:57:38 DEBUG stargate.RowResource: DELETE http://localhost:8080/books/ff417a5b-c4d0-4a43-b1c7-94c356fe0b72/attribute/5426359469582345882
10/01/13 18:57:38 DEBUG stargate.RowResource: DELETE row=ff417a5b-c4d0-4a43-b1c7-94c356fe0b72, ts=9223372036854775807, families=

{(family=attribute, keyvalues=(ff417a5b-c4d0-4a43-b1c7-94c356fe0b72/attribute:/5426359469582345882/DeleteColumn/vlen=0)}

—

> curl http://localhost:8080/books/ff417a5b-c4d0-4a43-b1c7-94c356fe0b72/attribute:/5426359469582345882 -X DELETE
—
10/01/13 18:57:49 DEBUG stargate.RowResource: DELETE http://localhost:8080/books/ff417a5b-c4d0-4a43-b1c7-94c356fe0b72/attribute:/5426359469582345882
10/01/13 18:57:49 DEBUG stargate.RowResource: DELETE row=ff417a5b-c4d0-4a43-b1c7-94c356fe0b72, ts=9223372036854775807, families=

{(family=attribute, keyvalues=(ff417a5b-c4d0-4a43-b1c7-94c356fe0b72/attribute:/5426359469582345882/DeleteColumn/vlen=0)}

—

Both are attempting to delete columns instead of the intended action of deleting families. The problem occurs because RowResource.java (line 282) will always return a split of length 2, since RowSpec.java (line 122) appends a colon if it's missing.

I've patched it so that a check will occur if the second split's (split[1]) length is 0 and acts accordingly. I'll attach the patch after I've run it against the test suite.

P.S. It's my first time submitting a patch, so let me know if I screwed anything up.