suqash: isBroke improvements, refs #8737
squash commit: issue rebuy only when not playing. refs 8697

Squashed commit of the following:

commit 38d63d4bf61ba86fe6719786dc58e5aca21bd60e
Author: Andor Goetzendorff <goetzend@cs.tum.edu>
Date:   Fri May 3 14:57:41 2013 +0200

    changed rebuy_given addition back to previous code

commit 2a2a07f7ebb943d60616f159932a4aef152e84c0
Merge: cae1ff3 de9444a
Author: Andor Goetzendorff <goetzend@cs.tum.edu>
Date:   Fri May 3 14:54:12 2013 +0200

    Merge branch 'master' into fb_8697_handle_rebuy_during_hand

commit cae1ff320594e25046f2d8169b73fc1c796efc43
Author: Olaf Gladis <olaf@pokermania.de>
Date:   Fri May 3 10:00:43 2013 +0200

    added rebuy_given again

commit 03919fc3ce2b93a70b9717cedddf68bcf25aacc1
Author: Olaf Gladis <olaf@pokermania.de>
Date:   Fri May 3 09:10:12 2013 +0200

    Revert "removed rebuy_given"

    This reverts commit 02da15adf61a94673733c0f1b29c8ee86b537e95.

commit 87c066315ca21606696fa845fa615c15439454a6
Author: Olaf Gladis <olaf@pokermania.de>
Date:   Fri May 3 09:09:51 2013 +0200

    isRebuyPossible

commit 02da15adf61a94673733c0f1b29c8ee86b537e95
Author: Olaf Gladis <olaf@pokermania.de>
Date:   Thu May 2 12:22:56 2013 +0200

    removed rebuy_given

commit 45cb259572ea40a33ef44f07170230c652150d69
Author: Olaf Gladis <olaf@pokermania.de>
Date:   Tue Apr 30 12:24:20 2013 +0200

    fix test and incorrect merge

commit 6c2e14aad11f17c06b6e92e995b9820df33e5f93
Merge: 7199318 cf4177a
Author: Olaf Gladis <olaf@pokermania.de>
Date:   Tue Apr 30 12:03:19 2013 +0200

    Merge branch 'fb_8737_isBroke' into fb_8697_handle_rebuy_during_hand

    * fb_8737_isBroke:
      Players are only broke when they have no money
      travis-ci: git+git pip protocol
      added tests for minimum buyin amount. refs #8727
      after a rebuy, a player has to have at least the minimum buyin. refs #8727

    Conflicts:
    	pokerengine/pokergame.py

commit cf4177a810b8008fd16b5a23df2f0d983431c237
Author: Olaf Gladis <olaf@pokermania.de>
Date:   Tue Apr 30 11:58:22 2013 +0200

    Players are only broke when they have no money

commit 7199318a1226829daa0e19d508776e0158b88166
Author: Olaf Gladis <olaf@pokermania.de>
Date:   Tue Apr 30 09:29:00 2013 +0200

    WIP, isBroke should be fixed before merging