* Adding types documentation
* refactoring and optimizing types databases
All based on docs
* fixing r_core_types_init
Basically we needed to try all possible 7 combinatios of file name,
I am not sure if there is a way to do that automatically.
one extra thing, since this is init subroutine we should make sure
that the db is already empty, when reloading this function
(by changing env vars), it will be reloaded thus it needs a reset first.
