Give the meta stats a host tag, fixes #126.

Signed-off-by: Vasiliy Kiryanov <vasiliy.kiryanov@gmail.com>
tcollector: tcollector.reader.lines_collected metric now tracks the number of lines collected.

Signed-off-by: Vasiliy Kiryanov <vasiliy.kiryanov@gmail.com>
Debian package: expose the max-bytes and backup-count options in the debian init script.

Signed-off-by: Vasiliy Kiryanov <vasiliy.kiryanov@gmail.com>