Add a small README to get started

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+For compilation of the mw_main test application the following additional
+libraries are needed:
+
+libbluetooth-dev
+libdbus-glib-1-dev
+libdbus-1-dev
+
+On Debian/Ubuntu they can be installed like this (as user root) from the
+commandline:
+
+       apt-get install libbluetooth-dev libdbus-glib-1-dev libdbus-1-dev
+
+After successful compilation you can try the application like this, inside
+the course directory execute:
+
+       ./metawatch C1:F4:23:96:4E:79
+
+(replace the BT MAC against the one of your watch)
+It should connect and print the connected watch type - in most cases
+"digital".
+After that the application waist for input, from the watch and
+keyboard/console. You can then try commands like "srtc" for setting the RTC
+of the watch or "cal" to add a nice month calendar to the idle screen etc.
+
+Currently supported commands (most zre just for testing):
+
+- quit - exit the applicaition
+- ahand # - advance the analogue watch hands by # minutes
+- srtc - sets the watch RTC to the current system time
+- grtc - get the RTC from the watch and print it
+- gistr # - get and print one of the four info strings from the watch
+  (firmwares up to 0.7.28 do not support this yet)
+- gdtype - get and print watch device type
+- rvbat - read and print the watch's battery voltage
+- rlight - read and print the watch's ambient light sensor value
+- modecfg - test command for mode settings, hardcoded to configure idle mode
+- rbtfg - read and print watch button config
+- svib - execute the watch vibration motor
+- tbmp - test sending a sample bitmap
+- t2bmp - another bitmap test ;)
+- text - test text rendering of the library
+- tline - test line drawing of the library
+- rbmp - reads the b&w pbm bitmap file "test.pbm" and sends it to watch idle
+  screen
+- tnote - test notification mode
+- tapp - test applicaiton mode
+- eoled # - enable one of the OLED display of the analogue watch
+- toled - test the analogue watch OLED displays (displays text)
+- cal - draw a nice one moth calendar to the idle screen