templates are very useful as teaching tool in order to make
a minimal application that uses a certain framework.
templates in the KAppTemplate repository will always get forgotten
(plus kapptemplate is not really necessary as they work in kdevelop as well)
An ideal situation would be frameworks having templates in their own repos
with templates of barebone apps using the main framework features.
In order to do that, the cmake stuff needed in order to correctly install
a template needs to be ported to a place avaiable to all frameworks

REVIEW:126185

This is deliberately modelled very closely on CMake's documentation
system.  It's a hefty patch, because it involved changing all the
documentation to be in reStructuredText format.  I also cleaned up the
copyright/license statements at the same time.

Note that the find modules contain the full license, due to the fact
that ecm_use_find_module() copies them out of the ECM distribution.