Fixes missing dependency to libgridcluster
apache2-http include dir fixed

Worked only on Centos where the header are in $prefix/include/httpd.
Now also works on Unbuntu where the headers are un $prefix/include/apache2.
Now manage json-c + pkgconfig on Centos & Ubuntu
Applies the renaming on path2container & oid2cid
Fixes source file listed twice.
Binary installation names reviewed.