Finish writing dact.conf options handlers

a. Archive
b. Pre/Post Install script

x. Darwin:  Does not set file permissions
y. Does not handle large files
z. Does not store original file permissions.

i. auto-upgrade for modules
ii. fix modules everywhere
iii. sign modules
iv. default to modules
v. module version stuff
vi. commercial modules

1. Get more compression algorithms
2. factor
3. --> lha (not GPL)
4. --> arj (not GPL)
5. --> rar (not GPL, shareware)
6. lzw 
7. Document code.
...
n. Write better documentation.
