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* Add our custom_types.db to collectd package.
* Define paths to custom_types.db and types.db to /usr/share/collectd.

* add pika-likwid readme
* update pika-control readme
* add pika-collectd-likwid-plugin readme
* update readme

Add a pika.spec file to install the contents of pika-control into /etc.

* Automate stuff to build pika rpm file. This package need no fancy
  docker stuff. If you have `rpmbuild` installed just run `make rpm`.

This container is meant to build the likwid-collectd plugin.

collectd-likwid-plugin build rpm in makefile

* Since the pika collectd python plugins are part of our collectd rpm
  package, set the path to python plugin `ModulePath` in collectd.conf.

This commit, adds the pika_metric files for the zen perfgroups to the
likwid rpm-package.

Add Dockerfile + scripts for an centos7 containter to build rpm's with.

* Since the patched config.mk some binaries are omitted during the build.
  This, commmit disables them in the spec file, otherwise rpmbuild will
  fail.

The patched config.mk file provides the following settings:
* set ACCESSMODE = perf_event
* set BUILDDAEMON = false
* set BUILDFREQ = false

* get the sources of the collectd package.

* This patch is required. For pika but unfortunately not merged
  upstream. See https://github.com/collectd/collectd/pull/3327

* using collectd-5.12.0