some improvements on bin_ningb.c and anal_gb.c and new cmd_plugin for fun

i've added hard implemented interrupt-handlers as symbols
entry0 jumps now to main

more autocomments
in most cases halt can be handled as a cjmp

that cmd-plugin could help on finding data in a snes- or gb- rom. those sprites are small enough to fit in almost every cmd. this video demonstrates the plugin: http://runas-racer.com/foo/cmd_2bpp.mp4