Lifted MAX $RecursionLimit to 512
Support more trailing operators
Slight performance improvement

test the existence of imported names outside the loop
and make sure they are imported before entering the loop
Sample output updated to new MAX

New MAX $RecursionLimit is now 512
Allow many symbols in Protect and Unprotect

This fixes issue #95 reported by langit
import settings compatible with Django 1.5
import settings directly outside Django-related modules
Merge pull request #96 from langit/master

Lifted MAX $RecursionLimit to 512
implement RegisterImport
add ExampleData1.txt example data format
begin rewriting Import
add mathics/autoload/format/Text/Import.m
Implement Conditional and Post Importers for RegisterImport
cleanup of RegisterImport
cleanup Import
implement conditionals for Import
Post importers are actually optional and occur seperately to defalt/conditional importers
cleanup Import tests
Implement Text Importer
fix bug in ReadList: graceful fail