Report coverage by committer

A customer has requested that the Bamboo/Clover plugin track coverage per-committer.

This could work as follows:

• a build is triggered by a commit
• bamboo builds, and a clover.xml is produced
• a post build plugin (possibly part of the clover plugin?) could extract who changed which source file from the SCM
• the plugin then queries the clover.xml for the coverage of each file and records that number against the committer
• a report is generated that shows each committer's %coverage

There are some problems with this, for example:

• how to handle multiple committers of the same file in any particular build
• if committer X modifies file F, but committer Y modifies test T that covers X - committer X is attributed with the coverage for X (clover per-test coverage could help here)