FB should continue working even if cvar/ directory is missing or it is empty
Changed version number 1.4.9.1 -> 1.5.0.0
Added fb_cvar.o to .gitignore
cvar initialization broken. cvars removed for now.

Commented out initialization of cvar environment in parser_gram.
Need to include building and installing the DLLs in cvars dir
before this gets wired back in.
Re-enabled cvar env init after Vasily's patch
Removed unused FSC_FOREACH grammar token
Moved fileset_checkraw up to remove prototype
Disconnect 'path' from 'name' fileset attribute

Disconnect 'path' from 'name' attribute for files and filesets.
Previously, the 'path' denoted the dir where the fileset or file
resided, and 'name' would be appended to it as the file's name, or the
fileset's root directory. This patch amends 'path' attribute resolution
so that 'name' is not part of it, and is only used as an identifier.
This is consistent with the way 'name' is used is general.
Fix fileset path in fileserver-new.f

Expanded path attribute to include root dir, as required by the previous
patch.
Added code support for paths starting with vars
Added grammar support for paths starting with vars
Amended output messages to accomodate new paths
Removed assert that would terminate correct runs

avd_get_int is used on unitialized variabled (e.g. randdist_init), so
the assert would terminate correct runs. In the future, we should
consider whether *_get_* functions should handle these cases or not.
Tab randvars should have var_type of VAR_RANDOM
Enabled seed attr for tab randvars
Aligned comment blocks to 80spc limit in fileset.*
Modified delay flowop to support nanosecond delays
Removed 'help' and 'usage' commands
Added UofT copyright in COPYING
file/fset defs shouldn't accept unsupported attrs