change url of openbugs from openbugs.info to openbugs.net

It seems that openbugs.info points to japanese website
fix openbugs url

openbugs.info seems to have disappeared, now at openbugs.net
Merge pull request #6 from kforeman/patch-1

Thanks .  They somehow lost their domain and wound up with squatters.  I thought we'd updated all the links, but apparently not.
Merge pull request #4 from stan-dev/update_openbugs_url

change url of openbugs from openbugs.info to openbugs.net
add GCM models
fix model Gaussian
add models from Heuristic Decision Making chapter
improve GCM_3_optimized model
add empty TwoCountryQuiz model file
Update ChangeDetection_Stan.R

The function stan wasn't using the model stored in "model" (it was self referencing to sample) and not working.
Merge pull request #9 from bnicenboim/patch-1

Fixed bug in ChangeDetection_Stan.R
delete duplicate rstan models
added .Rproj