Added support for ~/.mailcap mailcap file, allow user to provide is own mime type / program association (mw ones still goes first)

share/mutt-wizard.muttrc

@@ -3,7 +3,7 @@
 # mutt-wizard will have this file sourced from your muttrc.
 # In the interest of seamless updating, do not edit this file.
 # If you want to override any settings, set those in your muttrc.
-set mailcap_path = /usr/local/share/mutt-wizard/mailcap
+set mailcap_path = /usr/local/share/mutt-wizard/mailcap:~/.mailcap
 set date_format="%y/%m/%d %I:%M%p"
 set index_format="%2C %Z %?X?A& ? %D %-15.15F %s (%-4.4c)"
 set sort = 'reverse-date'