first iteration towards element access through memory
test script..
Merge branch 'master' into memaccess_elements
Update Madx.get_element (not using RPyC in master)
Merge branch 'memaccess_elements' into active-sequence

Conflicts:
	src/cern/cpymad/libmadx.pxd
Merge branch 'active-sequence' into memaccess_elements

Conflicts:
	src/cern/cpymad/model.py
Return list of element dicts from get_elements
Move get_elements to Sequence class

All sequence specific information should be retrieved directly from the
proxy object.
Split get_active_sequence() function from get_sequence
Merge branch 'memaccess_elements' into active-sequence