Limit vertical domain used by COSP

[brian-eaton]

The COSP simulator was not working with "FMT" compsets. This compset has a model top of about 1 Pa which is above where the cloud parameterizations operate. The COSP interface routine was modified so that COSP operates on the same vertical domain as the cloud parameterizations which is set the the namelist variable trop_cloud_top_press (1 mb by default). In addition a lot of code cleanup was done, and a bug fix was made for the layer interface values of height and pressure passed from CAM to COSP.

resolves #967- COSP prevents running "FMT" compsets.

Removed old tools for topo file generation.

resolves #1005 - Remove old topo generation software from CAM