cython-ref

* cimport <name>
* from <name> cimport <var>
* cdef extern from <name>
     <type> name (type)
     <type> name (type, type)
     
In EPython these should all be just import statements (no cimport or cdef) required. 
EPython files will have the .epy spelling to ensure they are compiled first to the run-time
requirement.
    
* absolute import to access variables in Python name-space

There will be a python module available so that import python returns a namespace that has 
variables available in sys, etc.

* cdef <name> <typename>

EPython: this uses standard type annotation

 <name> : <typename>

* @cython.internal
* @cython.final

EPython: change "cython" to "epython"

@epython.internal and @epython.final

* cdef class <name>

This is just standard class <name>  

* cdef public 

* cpdef name (types, ...)

EPython: By default classes, functions, and types are public and have both run-time specific and Python implementations.
Use @epython.internal to make certain functions not have external visibility.

* cpdef <ret_type> <name> (<type> <name>, ... ) except? <value>:

EPython: Exception handling will be run-time specific and this is not supported yet.