ex 1.7
Slow or fast options
POWERMAN FOR PRIME MINISTERgit add ex1-16.scmgit add ex1-16.scm
POWERMAN FOR PRIME MINISTER
Merge pull request #8 from trevorstedman/master

ex1-16
Merge pull request #7 from unixwars/master

Ex 11 and 14
Merge pull request #5 from OrazioWE7/master

ex 1.7
Merge pull request #6 from GusTheSadGeek/master

Slow or fast options
POWERMAN FOR PRIME MINISTER
Merge remote-tracking branch 'upstream/master'

Conflicts:
	ex1-16.scm
Exercise 1.15 - unfinished
Merge branch 'master' of github.com:GusTheSadGeek/SICP
Merge pull request #10 from GusTheSadGeek/master

Ex 1-15 partial
Merge pull request #9 from trevorstedman/master

small optimization to previous answer
demonstrate by substitution
ex1-16.scm updated
added stub exercises for grahaminn
ex 1.13
Merge pull request #11 from OrazioWE7/master

ex 1.13
Exercise 1.19 answers