mods of #477 added clarifications

added text explaining templates cannot be used with rrdcached
rewrote timestamp syntax, maybe now it went to the other extreme..
removed deprecated --cache parameter from the example section
fixed --daemon behaviour description, please check if it is true
mods of #477 added link to examples section

as advised
mods of #477 update-timestamps syntax

copromise? it still doesnt show they are 1) not all 3 needed 2) could be written in any order
Merge pull request #488 from phpmoli/patch-11

mods of #477 fix syntaxes, clarifications for rrdcached