Add Rake job to generate Vagrantfile.

  Enable jenkins to test the chef recipes.
  This commit refs #19.
Merge branch 'refactor' into dev
Modify the nagios-plugin directory name.

  This commit fixes #24.
Merge branch 'nagios' into dev
Modify Rakefile and Vagrantfile.erb in order to enable CI.

  This commit fixes #20.
Add dependency on the build-essentials cookbook.

  This commit fixes #25.
Merge branch 'nagios' into dev
Modify the unarchived plugin directory to the correct one.

  This commit fixes #24.
Merge branch 'nagios' into dev
Execute make install. This must be mandatory.

  This commit fixes #26.
Merge branch 'nagios' into dev
Introduce dependency on base recipe.

  This commit fixes #27.
Merge branch 'redmine' into dev
Merge branch 'dev'