Basic running sound for Steven

To Do:

- Randomise the sample for each step
- Make repeat frequency a function of walking speed
- Mix the sound levels

Closes 30
Merge remote-tracking branch 'origin/master'

Conflicts:
	StevenSeagull.gmx/StevenSeagull.project.gmx
Merge branch 'master' of https://github.com/graphiclunarkid/StevenSeagull