Migrated some MiXiM base classes to INET.
Migrated the MiXiM radio into INET.

The new radio model is called the detailed radio model, because it provides a more detailed
radio signal model (e.g. in terms transmission power over time and frequency, etc.).
Adapted the model to signals and the new radio interface.
Migrated MiXiM battery modules into INET.

TODO: merging and cleaning up the two battery interfaces
Moved the current network layer contract to common.
Moved the echo protocol to common.
Moved the IEEE 802.11 radio into a separate directory under physical layer.

Renamed Ieee80211RadioModel to SimplifiedIeee80211RadioModel.
Changed Ieee802Ctrl to implemented ILinkLayerControlInfo.

This change allows more generic handling of link layer control infos.
Added a new example that demonstrates different NIC configurations.

Contains 9 configurations for all combinations of
 - ideal, simplified and detailed radio models
 - ideal, BMAC, IEEE 802.11 mac models
Added fingerprint tests for the new nic configurations example.
Fixed NED names in examples and tests.

Followed renames in the models.
Fixed NED names in comments, packages, imports.
Fixed bug in AddressResolver during resolving interface ModuleIdAddress and ModulePathAddress.
Fixed bug in configuring router id in IPv4RoutingTable.
Added a new generic WirelessNic that contains a single mac and radio module.
Removed obsolete NotificationBoard notification types.
Added a TODO item.
Moved mobility modules into separate folders.
Fixed NED names after move.
Added new power supply contract.
Added two power supply implementations.