When removing instance : chmoding directories that are not writable because some instances do 'chmod 555' on directories.

When editing software/instance profile, submit button is now named 'Save'. Old name ('Update') was misleading.

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

In order to create subresource of /path/ it is required to use POST not PUT.

References:

 * http://www.w3.org/Protocols/rfc2616/rfc2616-sec9.html#sec9.5
 * http://www.w3.org/Protocols/rfc2616/rfc2616-sec9.html#sec9.6

Return 201 Created instead of 200 OK, whichis correct PUT response.

Ref: http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html

This reverts commit d817f62c.

It is not required, as SlapOS node installation profile is responsible for
providing by default good (:= with networkcache) buildout environment.

As older versions of slapos.core will ignore slapos:buildout switch it is safe
to direct them to unexisting one.

New slapos profiles are generating buildout_networkache in self location, so as
already all parameters are hardocded, use such path directly.

Solves "Neighbour table overflow." and network issues.

Still computer key and certificate is there.