Relocate source into a pyrpca or pylar package

[jcfr]

To ensure there are no conflict with existing toolkits, import of the objects should be done using:

import pyrpca.core.ialm as ialm
import pyrpca.core.ealm as ealm

instead of

import core.ialm as ialm
import core.ealm as ealm

[jcfr]

Cc: @fbudin69500

[fbudin69500]

Thanks @jcfr . I have fully reorganized the package and I am about to create a pull request.