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