Merge pull request #2 from PervasiveComputing/master

pull two
<Driver> VLC actuator.
<Driver> OpenWeatherMap sensor (to be finished)
<Model> Add human-readable name to devices.
<Model> measureType: int -> String
<WebServices> GET /sensors + GET /actuators: possible to add conditions on type and/or customId.
<WebServices> Simple Rule Creation Service.
Some changes in the frontend server
Merge remote-tracking branch 'upstream/master' into webServices
<Webserver> Loading already-added devices when server starts.
First draft for the hue base
Merge pull request #5 from Aldream/webServices

Various Small Fixes
Merge pull request #3 from PervasiveComputing/master

pull 3 from master
Merge pull request #8 from Aldream/virtual-devices

Virtual devices
Merge pull request #4 from PervasiveComputing/master

pull virtual devices
Merge pull request #7 from bim9262/master

Added hue actuator