nucleo board example with external interrupt on button
working external interrupt
moved positioning to src/
module to measure angles between beacons
code used to measure the rotational speed of the laser
functionig measurement of angles with 1 laser
positioning works with 1 laser
fixed the tests
added travis status to README
Merge branch 'data-acquisition'

`kalman_test.cpp` isn't added to the build yet and wouldn't pass.

Conflicts:
	package.yml
fix travis
Revert "fix travis"

This reverts commit 6fff4c9ed81dfac6b583f01582280c0b65d9fdef.
Merge pull request #17 from froj/master

Merging of the code that actually gets a position out of the beacons