fixed a bug where "number out of range" error led to bogus "label already defined" errors
made "number out of range" errors more specific (8/16/24 bit range)
re-phrased two error messages
cleaned up docs concerning "command/opcode/mnemonic/instruction"
added test program to trigger "out of range" errors
internal cleanup concerning INW/DEW/JAM mnemonics
git-svn-id: https://svn.code.sf.net/p/acme-crossass/code-0/trunk@278 4df02467-bbd4-4a76-a152-e7ce94205b78
