possible fix for #589
added xenserver620 for issue #589
added os_version flag to ksvalidator
Issue #614 - virtinst module is not available in new OS's
putting import statements back in sub-function
Merge pull request #652 from sdherr/master

Issue #614 - virtinst module is not available in new OS's
Merge pull request #591 from jonaz/master

Generating xenserver620 append_line correctly and distro signature.
Small fix for #654, reported by Jeus de Baldoma.
Merge pull request #655 from jmaas/master

Small fix for #654, reported by Jeus de Baldoma.
Cleanup PXE files for systems that have netboot disabled. Fixes #618
Merge pull request #656 from jmaas/master

Cleanup PXE files for systems that have netboot disabled. Fixes #618
Better checks for presence of the proxy field in buildiso.
Probably fixes #595
Merge pull request #657 from jmaas/master

Better checks for presence of the proxy field in buildiso.
Removed legacy warnings from buildiso.
Merge pull request #658 from jmaas/master

Removed legacy warnings from buildiso.
Add some logging to boot_files copy in manage_in_tftpd.
Merge pull request #659 from jmaas/master

Add some logging to boot_files copy in manage_in_tftpd.
Added scripts to rsync.template and action_replicate.
Fixes #645
Merge pull request #660 from jmaas/master

Added scripts to rsync.template and action_replicate.
Enable Xen in pxegen.py. Possibly fixes #639