Grand Tack iPython Notebook

Revert "Initial for Grand Tack module"

This reverts commit
70bc86b0de1ca4895aac2af0160fe2357615993b.

Revert "Initial Grand Tack Model commit"

This reverts commit
5b9ea4e4ff0d4c477381c3336d7a51d4a080eba6.

Initial Grand Tack Model commit

Initial for Grand Tack module