[windows] pin systemu, drop pleaserun, ruby 2.0.0-p481, updated devkit
url, create ssl cert dir
Merge pull request #91 from portertech/hotfix/windows

[windows] pin systemu, drop pleaserun, ruby 2.0.0-p481, updated devkit url, create ssl cert dir
[sensu-plugin] use the latest sensu-plugin version, 1.1.0
[msi-author] updated msi author, Heavy Water Ops
Merge pull request #92 from portertech/feature/sensu-plugin

use the latest sensu-plugin version, 1.1.0
Merge pull request #93 from portertech/feature/msi-author

updated msi author, Heavy Water Ops
Embedded Ruby by default
Improve building speed by using ccache and multiprocess make
Update versions and mirrors
Add gems for plugins
Add cleaning script