New deutsche_bahn component

Template binary sensor

Conflicts:
	homeassistant/components/sensor/steam_online.py

Fix mysensors switch & light types

Use get_component instead of importing component for mysensors

* Move S_LIGHT and V_LIGHT from light back to switch platform, to avoid
  double devices showing.
* Remove MySensorsLightPlain class from light platform, since it's not
  needed anymore.
* A light switch with only a switch, ie no dimmer or
  RGB controls, will show as a regular switch device.

Fixed the workaround for philio slim multi sensor.

This adds hot, cold, and moving sensor_class values for things that we
may want to support.

Uses the (schiene)[https://pypi.python.org/pypi/schiene/0.14] API to communicate with the webserver of bahn.de
and pulls iformation about a specific connection from the (bahn.de)[http://www.bahn.de/p/view/index.shtml]
webpage. The departure time of the next train for the given connection is shown.
In case of delay, the delay is also shown. Additional `ATTRIBUTES` are used to
inform about e.g. the type of the train, price and if it is ontime.

Usage:

    sensor:
      platform: deutsche_bahn
        from: name_of_start_station
	  to: name_of_final_station

Problems:
I'm testing it for quite some time, but I have never seen the `ATTRIBUTES` in case
of a delayed train. The `ATTRIBUTES` are directly passed from the `schiene` API. So this
usecase has not been tested yet.

deutsche_bahn ist not supporting the `schiene` api unlike in the swiss_public_transport case.
It's not guaranteed that `schiene` will work forever, infact it can happen that Bahn AG will
intentionally brake the API at some point. In the past Bahn AG has not allways been very supportive
to the opensource community.

Bring TCP component test coverage to 100%

Changed the key matching to utilize integer values. It does not report always return the hex marker '0x' in the identifier strings. This Re closes issue #1349

Fix issue #1301

Added a Steam sensor

Filter out AirCam models in UVC camera platform

Template helpers

The older (unsupported AirCam) models behave differently and also apparently
suffer some under the last release of the NVR that supported them. Since they
are EOL and not supported by current software, filter them out so we don't
break while trying to extract an image from them.

Fix dispatching for regular WeMo switch devices.

I only have WeMo Link and Insight devices and assumed model names of other
devices were fairly straightforward.

But it looks like the regular WeMo switch uses 'Socket' as the model name.

New template helpers now, utcnow, distance, closest

UVC Fixes, features, and tests

This adds tests for the uvc camera module. It's a good thing too,
because I found a few bugs which are fixed here as well:

 - Graceful handling of non-integer port
 - Failure to take the first host that works when probing host,internalHost
 - Failure to detect if neither of them actually work

This also converts the code to only call add_devices once with a listcomp.

The NVR tells us the admin username, but not the password for the
camera. Right now, we assume the default password, which obviously
doesn't work for people that have changed it. The uvcclient library
provides a way to set the cached admin password for a camera, which
is stored in a client-specific location. We can utilize that to
grab the password, falling back to the default if it's unset. With
this, people just need to run a command per camera to set the
admin password on their systems, if it has changed.