Add a log message for when fetching input fails.
Make the job coordinator a system process.

The reason the job coordinator was not a system process before was that
it's terminate would have been called when its parent (the http request
handler) finished.  This is not an erlang bug, the behaviour is explained
in this mail thread:
http://erlang.org/pipermail/erlang-questions/2005-January/013943.html
and in this stack overflow answer:
http://stackoverflow.com/a/7753788/830681

The solution is linking the http handler from the newly created child.
Bump version to 0.5.0
Use lager version 2.0.3.

We use a lager tag to make sure regressions in lager will not cause issues for disco.
Fix test_query for python3.

Python's hash is not guaranteed to result in the same value in different
runs because of the salt added to them.
Merge pull request #433 from pooya/shayan/python3

Fix test_query for python3.
Remove debian package info.
Add the release date for 0.5.
Remove the debian installation description.
Add a note for FreeBSD installation.
Add folsom as a dependency.
Simplify the implementation of two functions.
Start folsom on the slave nodes.
Add folsomite for exporting profiles.

Folsomite needs a remote graphite server.  It will be disabled by
default.
Add profiling to some functions in disco and ddfs.
Merge pull request #435 from pooya/shayan/folsomite

Shayan/folsomite
Replace disco ball image with the new disco logo.
Merge pull request #436 from pooya/kircic/develop

Replace disco ball image with the new disco logo.
Update AUTHORS
Add a separate metric for ddfs_web and disco_web.