add .gitignore
add test for bundle.cc because I'm going to modify it
Refactor compression code: extract into compression.{hh,cc} and hide compression methods behind a consistent interface
Support for lzo; only internal and not tested
Test case for lzo compression and lots of bugfixes; test passed, now
Commandline argument for lzo
misc
clean up
Merge branch 'master' of github.com:BBBSnowball/zbackup