Squashed commit of the following:

commit b320e10451f60704f8bf17c3b15ed4760d7df705
Author: Romain Courteaud <romain@nexedi.com>
Date:   Tue Aug 30 16:48:28 2011 +0200

    Remove unwanted code.
    This will ease merging with the master.

commit 4bed989c16ede96ed49a698fb292d6df65afc5c3
Merge: 290b06b dd07d69e
Author: Romain Courteaud <romain@nexedi.com>
Date:   Tue Aug 30 16:36:54 2011 +0200

    Merge branch 'master' into usage_report

commit 290b06b12ea810918b59b9abe7b91becf9c8f702
Author: Nicolas Godbert <ngodbert@tiolive.com>
Date:   Wed Jun 1 10:41:38 2011 +0200

    Some fixes

commit 45735471d13c7eb98568408e07ae5b2023f6f57a
Author: Nicolas Godbert <ngodbert@tiolive.com>
Date:   Tue May 31 18:03:05 2011 +0200

    Modification of the methods which generate the XML report

commit b10d7ba05615d6c31d68350be8ae09e4020fbe5f
Author: Nicolas Godbert <ngodbert@tiolive.com>
Date:   Tue May 31 17:50:25 2011 +0200

    We count the CPU consumption time since the last XML report creation

commit b4abc09cb48664c026bab5acf26382ddca9537d5
Author: Nicolas Godbert <ngodbert@tiolive.com>
Date:   Tue May 31 17:39:47 2011 +0200

    Slapreport only generates a report if the database is not empty