Fixed userinfo crash + color autoset/help + status

/userinfo no longer crashes for nonexistent users.
Initial color can now be set before connnecting:
Via the new -c command line option, or the connect prompt.
Status & error messages look more uniform (begin & end with ---).
/color gets more arguments:
- ? for usage info.
- list for a color list.
Misc minor stuff:
- Fixed missing * in gitignore
- Spelling error in turquoise.
- Rephrased /color status message.

notnola / pinychat