Merge pull request #16 from Grundlefleck/master

merge Grundlefleck changeset that fixes #15
Allow specifying a gravatar image for a mugshot.
tidy up gravatar changes
upgrade to hamcrest 1.3
upgrade guava to 12.0.1
upgrade apache http components
upgrade commons io
replace use of deprecated ThreadSafeClientConnManager with new PoolingClientConnectionManager
only display all-green squirrel if there are actually some green builds... no builds at all does not count -- fixes #14
more intelligent detection of the all-green state, and show the all-green image regardless of mode -- moar squirrels, so fixes issue #12
avoid logging errors when CI-Eye is running behind a firewall and cant see api.github.com to do its version checks.
default logging to logfile in the logs/ directory
robustificate the percentage class in the face of negative values
add release notes for the 0.3.2 release
update version number for next release
point users at documentation on Wiki
remove superfluous -stupid- picture keyword
on TeamCity 7.0 it is possible to obtain information about investigators, so use this to mark as under investigation where appropriate
better report failures to PUT/POST
tidy up log message