Changed version number 1.4.9.1 -> 1.5
Replaced assert in avd_get_int with return (0). Otherwise, variables not defined
(e.g. when creating a tabular randvar) would terminate a correct execution.
Commented out initialization of cvar environment in main. Need to include building
and installing the dynamic shared libraries in cvars directory before this gets
wired back.

Typo correction in fb_avl.h.
- Fixed bug where tabular randvars would not be initialized as random vars
- Reintroduced FSV_RANDVAR resolution and var_is_set4_randvar (should be
  renamed) to allow echoing randvar info