squash commit: issue rebuy only when not playing. refs 8697

Squashed commit of the following:

commit ad550ac63427a066f3bfbb98e3c4d7206eb1b61f
Merge: 309ddb7 e81e04b
Author: Olaf Gladis <olaf@pokermania.de>
Date:   Fri May 3 11:03:44 2013 +0200

    Merge branch 'master' into fb_8697_handle_rebuy_during_hand

    * master:
      removed obsolete guard

    Conflicts:
    	pokernetwork/pokertable.py

commit 309ddb7a003c49d257b389f495e7a415174913e9
Author: Olaf Gladis <olaf@pokermania.de>
Date:   Fri May 3 10:00:03 2013 +0200

    test fix

commit 1d761865e1ee8033175fc0dc233a26aad308c85b
Merge: ef07667 e4dbfdc
Author: Olaf Gladis <olaf@pokermania.de>
Date:   Thu May 2 13:26:26 2013 +0200

    Merge branch 'master' into fb_8697_handle_rebuy_during_hand

    * master:
      travis-ci: try git+git
      travis-ci: pip has it's own git uri syntax 0o
      travis-ci: don't hide apt-get update output
      travis-ci: try with updated pip and git url
      travis-ci: try tarball/master now 0o
      travis-ci: use tar.gz instread of zip
      test_pokertable
      fix test_pokertable
      fixing test_pokerservice
      after a rebuy, a player has to have at least the minimum buyin. refs #8727
      saveHand: code style, hand_cache still seriously fucked up
      there is no table_serial in the hands table
      fixing tests after wildcard mess
      import pokerpackets.packets.* for now

    Conflicts:
    	tests/test_pokertable.py

commit ef07667efe483670593440667ed6351861af8114
Author: Olaf Gladis <olaf@pokermania.de>
Date:   Thu May 2 13:23:12 2013 +0200

    whitespace clean up

commit ffe7c44ebcc312bb1d2b084ecbefe0f5bed54aed
Author: Olaf Gladis <olaf@pokermania.de>
Date:   Thu May 2 13:22:32 2013 +0200

    don't save avatar in rebuy_stack

commit c21b28d1e94625be4bcade86d35a19d9c88f7318
Author: Olaf Gladis <olaf@pokermania.de>
Date:   Thu May 2 12:22:20 2013 +0200

    removed rebuy_given

commit 41866aaf11c1f0464515061e9433a13d65eb17f9
Author: Olaf Gladis <olaf@pokermania.de>
Date:   Fri Apr 26 16:58:11 2013 +0200

    test fix

commit 81e9881bdb1959ed22666bbf6f20d5a85b8dc633
Author: Olaf Gladis <olaf@pokermania.de>
Date:   Fri Apr 26 13:08:54 2013 +0200

    send Ack after incommin rebuy

commit f7647d9394e8347c389f9b860e6e7b5a676e1219
Author: Olaf Gladis <olaf@pokermania.de>
Date:   Fri Apr 26 12:25:51 2013 +0200

    fixed rebuy