Update data.txt

Adding Kiva.org

Contributor: Sam Mankiewicz, CTO at Kiva.org, sam at kiva dot org
Source: internal headcount

3 of 24 if you just count software developers.  2 of 3 if you add QA, but 0 of 4 if you also add Ops.
Merge remote-tracking branch 'upstream/master'

Conflicts:
	data.txt
updated Kiva for May 2014.
Contributor is Sam Mankiewicz, CTO, based on internal counting of heads.  sam at kiva dot org
Merge pull request #134 from kiva/master

updated Kiva, May 2014