Add lab 8
Sampling and z-transform
Merge branch 'master' of https://github.com/cpjobling/EG-247-Resources

Conflicts:
	week9/sampling.ipynb
	week9/z-transform.ipynb
Merged changes to week9
Add test fda to lab8
Labify testfda.m
create audio demo file
Ignore *.wav files
Add alias demo 1
week9 sampling lecture ready
week9 sampling lecture ready
Merge master
updated slides