Import FST code from GtkWave SVN
FST dumping for integer types
Merge branch 'master' into fst
Merge branch 'master' into fst

Conflicts:
	src/nvc.c
FST formatting for more data types
Rejig waveform generation arguments
Merge branch 'master' into fst
Implement scopes for FST
Fix direction of FST array signals
Port direction in FST output
Simpler method of generating scope information
Set FST comp name
Emit scope for packages
Stop calling event callbacks for each delta cycle
Emit initial values in FST
Set more VHDL-specific data types in FST