Write a module for crash detection (coredumps)

[gfriloux]

We need a module that would report coredumps from various services.
The idea is to set the coredump directory on the system (handmade by user), and watch this directory over time to detect new coredumps.

Once detected, retrieve a backtrace from the coredump, send it to Alfred, that would have the same module to handle sending to registered developpers.

The message should give the coredumps fullpath + backtrace and any additional information, but not try to send the coredump itself as it might be huge (and maelstrom library only has poor file transfering capabilities, through xmpp messages, giving low bw).