Git ignored files completion
Update developer documentation for Git repository
News: Git conversion
Add comparison operator for nut::Device class.

Make std::set<nut::Device> work and not dropping devices anymore.
Merge branch 'git-changelog'

Runs 'git log' on the current branch, and generates a GNU-style ChangeLog.
apcsmart: add old APC 600I compatibility entry

Though without 'T' - until we handle situations when single nut variable
is able to correspond to more than one apc var.

Signed-off-by: Michal Soltys <soltys@ziu.info>
Testet-by: Markus Pruehs <apc@markus.pruehs.com>
Issue #4: Specify starting commit to gitlog2changelog.py