rewrite build and package script by python
implement autostart support for osx
deprecate genapp.sh and put the scripts into scripts directory
update outdated part of Info.plist
show revision in the about dialog
Merge pull request #368 from haiwen/update_info_plist

[NFC] update outdated part of Info.plist
Merge pull request #366 from haiwen/show_rev_version_in_about_diaglog

show revision in the about dialog
Merge pull request #360 from haiwen/rewrite_build_script_by_python

deprecate genapp.sh
Merge pull request #349 from haiwen/support_autostart_osx

implement autostart support for osx
add a global menubar and docker menu on macosx platform