Add less generic exceptions per #5.

Change-Id: Iae78d2a126997c0922a4ec133eb107ae44f93e4a
Set 5 second timeout on SSH agent socket per #6

Change-Id: Idb23d23464d07efc1b336679db6e6df26f376fd8
Bump version to 0.1.3

Change-Id: Ib070c81f2285e386e88c4dc871a4a698bcc4f7b8
Merge pull request #7 from negz/master

Add specific exceptions and handle SSH agents with no added keys