Change log

- (from 0.4)  To help in more customized macros:
--- Add "/z" as a short synonym for "/script"
--- Add global functions "CS_cheap()", "CS_prev()", "CS_good()" that can be used in /script lines.  They correspond to the "-", "+", and "+ +" actions of the /cheap command, respectively.

0.5 will properly skip creating macros for abilities you haven't learned yet.  Some of the slash command verbosity is reduced.  Updated ammo will be displayed as feedback even when it hasn't actually changed, so that the user isn't left wondering.