Create stable/20150000 from trunk at revision 3507.

git-svn-id: https://projects.coin-or.org/svn/CppAD/stable/20150000@3508 0e562018-b8fb-0310-a933-ecf073c7c197
1. Set version number to 20150000.
2. Make changes that convert master to a stable version.

new_stable.sh: Changes to create stable/20150000.

git-svn-id: https://projects.coin-or.org/svn/CppAD/stable/20150000@3509 0e562018-b8fb-0310-a933-ecf073c7c197
new_stable.sh: Move conversion from svn to git.

git-svn-id: https://projects.coin-or.org/svn/CppAD/stable/20150000@3510 0e562018-b8fb-0310-a933-ecf073c7c197
new_release.sh: Convert from running in svn repo to running in git repo.

git-svn-id: https://projects.coin-or.org/svn/CppAD/stable/20150000@3511 0e562018-b8fb-0310-a933-ecf073c7c197
new_release.sh: move tag (if it already exists).

git-svn-id: https://projects.coin-or.org/svn/CppAD/stable/20150000@3512 0e562018-b8fb-0310-a933-ecf073c7c197
new_release.sh: change directory where conf is checkout out with svn.

git-svn-id: https://projects.coin-or.org/svn/CppAD/stable/20150000@3525 0e562018-b8fb-0310-a933-ecf073c7c197
Merge branch 'master' into 20150000

git-svn-id: https://projects.coin-or.org/svn/CppAD/stable/20150000@3526 0e562018-b8fb-0310-a933-ecf073c7c197
Merge branch 'master' into stable/20150000
Create check_soruce_runs and use it to simplify cppad/CMakeLists.txt.