Add ErlangCheck

Hi,

This is a copy of pull-request to upstream rpmlint[1], which is neither rejected nor accepted for month. However, some maintainer's demands have been taken into account.

This consists of two fully production-useful checks:
 - beam-compiled-without-debug_info
 - beam-was-not-recompiled
They had been tested month ago at OBS before the request to upstream was created.

However, to fully enable this checks, one need to put python-pybeam into rpmlint-mini. There is another extra dummy check to keep rpmlint working when python pybeam package is not installed. It prevents rpmlint from crash and prints 'beam-found-but-no-pybeam-installed'.

[1] http://sourceforge.net/p/rpmlint/code/merge-requests/2/
[2] http://lists.opensuse.org/opensuse-packaging/2013-05/msg00064.html