Added Dashlane, Keeper, Persowna, and SecureSafe

See #448
Corrected image format for Keeper
Added images and exceptions

I couldn't find an image for Persowna so I removed the reference to
that.
Corrected Dashlane
Merge pull request #539 from jamcat22/patch-3

Added Dashlane, Keeper, Persowna, and SecureSafe
Add Aha! to Developer
Add Cloud 66 to Cloud
Add MongoHQ to Developer
Merge pull request #566 from dsoegijono/aha

Add Aha! to Developer
Merge pull request #568 from dsoegijono/mongohq

Add MongoHQ to Developer
Merge pull request #567 from dsoegijono/cloud66

Add Cloud 66 to Cloud
Merge branch 'master' into gh-pages