Allow for alphanumeric collectd version numbers

Some PPA packages currently report their version as
5.x.x.git
Merge pull request #86 from stepheno/collectd_version_check

Regex looks good, puppet runs fine with relevant packages.
(gh-85) Fix null versioncmp bug in plugin templates

If the collectd_version fact returns null then
the versioncmp function throws a ruby error. This
commit add checks to see if it is null before calling
versioncmp.

Fixes #85
Merge pull request #87 from pdxcat/gh-85

(gh-85) Fix null versioncmp bug in plugin templates
Release 1.1.0

Summary:

This release adds support for new plugins and fixes multiple bugs in
several plugin configurations.

Features:

- Added load plugin
- Added memory plugin
- Added rrdtool plugin
- Added swap plugin
- Initial version of PostgreSQL plugin
- Add protocol paramter to write_graphite plugin
- add tests for network module
- Support pre-4.7 network configs.

Bugs:

- Fix bug that always creates notification in exec on empty params
- fix typo in apache plugin manifest
- Make sure that plugins are always loaded before their configuration
- Add version check around emitting Protocol config
- mysql: use double quotes according to version
- Allow for alphanumeric collectd version numbers
- (gh-85) Fix null versioncmp bug in plugin templates
- (gh-69) Fix package name on RedHat
(gh-69) Fixed package name on RedHat
Merge pull request #88 from cameronbwhite/patch-1

(gh-69) Fixed package name on RedHat
Merge pull request #89 from pdxcat/release-110

Release 1.1.0