progress (#18)

* Added: Signal handlers for SIGILL and SIGABRT ifdef DEBUG
 * Added: New command: CRASH, for debugging/development...
 * Changed: configure now defaults to optimizing for code size.
 * Added: configuration option --optimize=speed or --optimize=size
changes to configure #17

.gitignore

@@ -1,17 +1,21 @@
 # emech .gitignore
 
-energymech
 
+# autogenerated files
 src/Makefile
 src/config.h
-src/*.o
-src/energymech
-src/gencmd
 src/mcmd.h
 src/usercombo.h
+
+# compiled files
+energymech
+src/energymech
+src/*.o
+src/gencmd
 src/aliastest
 src/safepathtest
 
+# mech typical user config files
 *~
 *.bak
 mech.passwd
@@ -22,6 +26,8 @@ mech.session
 root.zone*
 trick.conf
 
+#  developer files
+.use_size
 conf
 debug*
 *.log