Add exponential examples
correct euler.m
Add week5 lab4
Add first lab exercise
add fig5_7 rename params.m -> rlc.m
Completed lab exercises
Fourier Part 2 almost ready
Minor adjustments
More minor adjustments
Fourier Part 2 Ready
Checkin ednd of work day
Corrections for fourier3
Corrected heading number in state-space presentation
Make Capacitance value Cap rather than C

To avoid conflict with output matrix C
Regenerate slides for week 4
updated state space slides
Add week5 slides