Added new RRADef option and reworked rrdtool/rrdcached config
Added a parameter for RRADef : precision
Revert "Merge branch 'patch/config_rra_in_rrdcached_plugin' into release/5.4.0"

This reverts commit b43a1293fbde0df3b67d8c1df88fa017aca4e4f8, reversing
changes made to 8190a1dd54398dee6b6f03b79dfad5962e9a74fc.
Merge branch 'patch/config_rra_in_rrdcached_plugin' into patch/rrdcreate_new_options

Conflicts:
	src/collectd.conf.pod
	src/rrdcached.c
	src/rrdtool.c
	src/utils_rrdcreate.c
Merge branch 'patch/rrdcreate_new_options' into release/5.4.0

Conflicts:
	src/rrdcached.c
	src/rrdtool.c
	src/utils_rrdcreate.c
	src/utils_rrdcreate.h
Reverted back some documentation
New release 5.4.0-20131206