add options to show api command to show applications, codecs, file formats, ect. and cleanup the output format of this command.  Thanks jkr888 (Johny Kadarisman) for the contribution.

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@1630 d0543943-73ff-0310-b7d9-9358b9ac24b2