Merge pull request #62 from pschiffe/master

Bugfixes/Enhancements in Hardware and System
tuned requirements for several scripts

Networking, software, hardware and storage depend on recent changed in
openlmi-scripts.
system: added version require and bumped release
documentation updates

Added few Makefiles and setup configs.
Just to make distribution to PyPI easy.
updated changelog
hardware: deal properly with older versions of providers

LMI_DiskDrive class was added to openlmi-hardware just recently. Don't
expect it to be present on broker.
storage: fix mount list
Merge pull request #63 from jsynacek/devel

storage: fix mount list
System: added OS info