minor log message cleanup
support stream=yes in xtrabackup for compatibility with old config files
clarify log messages about advisory logging in holland

These were confusing - now we make it clear that we abort because
another holland process is likely running.
add apply-logs option for xtrabackup plugin

This makes innobackupex --apply-logs conditional
cleanup xtrabackup dry-run log messages
add documentation to holland

This documents the pgdump, mylvmdump and xtrabackup plugins
note the xtrabackup apply-logs option in CHANGES.txt
fix some formatting issues in mysql-lvm documentation
add documentation for mysqld options in mysqldump-lvm
fix header in mysql-lvm documentation
fix whitespace in xtrabackup docs
default tmpdir to None, with the same semantics as {backup_directory}
write tmpdir to [xtrabackup] section in defaults file
bump holland version to 1.0.8
cleanup logging in apply_xtrabackup_logfile
adding missing BackupError import to mysql-lvm plugin
minor message cleanup in build_rpms script
added mock_rpms.sh bash script for generating holland rpmsets via mock
make dry-run output for mysql-lvm useful

Ensure we log both the source and intended snapshot volume names.
Ensure we log the intended temporary directory.
Ensure we fail a dry-run if the backup configuration appears incorrect
cleanup docs