Adding HubSpot.

Contributor: Jessica Scott, Tech Lead at HubSpot, @jessbrandi
Source: internal headcount

Includes all full-time Software Engineers (2 women of  49 total) and Tech Leads (2 women of 16 total). Our Tech Leads manage small teams, but still spend the majority of their time coding.
Merge pull request #78 from jessbrandi/master

Adding HubSpot.