Add a few OOK dumps.

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+-------------------------------------------------------------------------------
+BTHR968: OOK data
+-------------------------------------------------------------------------------
+
+This is an example capture of a virtual Oregon Scientific BTHR968 temperature,
+humidity and pressure sensor which transmits at 433.92 MHz using Manchester
+encoding and amplitude modulation.
+
+The signal was received by an RF Solutions RX12 superhet decoder chip and then
+passed to the logic analyser.
+
+In order to decode the Oregon v2.1 BTHR968 you will need to change the
+preamble to '1010 ...' in the ook decoder. Currently you can ook decode either
+a preamble of '1111 ...' or '1010 ...' but not both at the same time, so you
+can see Oregon v2.1 or v3 sensors.
+ 
+Details:
+https://gist.github.com/RouquinBlanc/5cb6ff88cd02e68d48ea BTHR918N_ArduinoSender.ino
+https://www.rfsolutions.co.uk/downloads/1481732062DS-AM-RX12.pdf
+
+
+Logic analyzer setup
+--------------------
+
+The logic analyzer used was a USBee AX Pro / Saleae Logic clone (at 25kHz):
+
+  Probe       RX12
+  ----------------
+  0           OUT
+  1           Output from Arduino running virtual BTHR968
+
+
+Data
+----
+
+ * oregon_bthr968.sr:
+   Contains a single set of pulses that belong to a virtual Oregon Scientific
+   BTHR968 temperature, humidity and pressure sensor. These should decode as
+   channel 2, battery OK, rollingcode BC, temp 11.2 deg C, humidity 52%,
+   pressure 1013mb, checksum OK.