Version 0.2.0 - 16 July 2013

Added a grid module (provides functionalities similar to the CTM_GRID and CTM_TYPE routines of GAMAP).
Added tools.atm module (generalization of USSA_ALT, USSA_PRESS and USSA_TEMP routines of GAMAP).

Version 0.1.0 - 15 April 2013