Added 4-01
Updated linkage to relative cinder repo.
Ex 3-11 is functional.
Clean up.
Merge branch 'cinder'
Added ex 4-01
Added ex 4-03
Added ex 4-04
ex 4-05 almost working.
Ex 4-05 is working
Started putting together ex 4-6
ex 4-6 finished
Started putting together ex 4-7
Ex 4-7 complete
Started Ex 4-8
Ex4-8 is getting closer to being finished.
Removed a test project.
More progriess on Ex4-8
Finished ex4-8
Added ex4-9