Merge pull request #12 from weaverba137/master

Add note about chapter 5 equation.
added error #13
Update README.md

While it doesn't change the result when the code is run as written (because sigma is set to unity), if the user adjusts the standard deviation of the random sample it will affect the estimated error on the mean.
Merge pull request #14 from AndrewRook/asr_edits

Adjusted parameter in pyMC example
flag minor typo for Eq. 5.107
Merge pull request #15 from gully/master

flag minor typo for Eq. 5.107
implemented report #16
closes issue #17, eq 8.77 and 8.78
Minor typo in Laplace code box