Add --verbose to test command

It's proved sufficiently useful in debugging things like test hangs that
this should probably be the default
Sort out all the copyright notices

... missing from several files ...
Simplify the introduction and README
Fix video port captures

The _get_ports method was returning the incorrect camera port for
video-based still image captures. Furthermore, the video splitter
requires reconfiguration whenever the camera's video port configuration
is changed (tests picked this up when the resolution of returned images
was incorrect)
Disabled raw-RGB capture from video port

The video splitter introduced for #26 doesn't support RGB input. We need
to investigate an alternative but for the time being, raw-RGB capture
via the video port is sufficiently niche functionality that we should be
able to get away with just disabling it without inconveniencing too many
users.
Introduce a split timeout

Having an infinite timeout in the new split function is too dangerous.
I'm not 100% sure what a reasonable timeout for this is, but 30 seconds
seems a reasonable starting point.
Merge branch 'master' of spider:~/picamera
After some reading, 10s is a better timeout
Added a PiCameraWarning class
Split recording only works in CBR

Currently the firmware only outputs inline SPS headers when in CBR mode,
not VBR. To protect against this, we now force bitrate to 0 (VBR mode)
when quantization is specified and non-zero, and then raise an exception
if an attempt to split the file is made when either inline_headers is
False or bitrate is 0.
Update docs to cover new split requirements