Part of a much needed cleanup. Move semantics routines into its own

directory. Move out lots of stuff from __init__ to their own files.
Add file loading tests. Document AST handling a tad more complete.

test/Makefile

@@ -24,13 +24,15 @@ check-2.7: check-bytecode check-2.7-ok
 
 #: Run working tests from Python 3.4
 check-3.4: check-bytecode
+	$(PYTHON) test_pythonlib.py --bytecode-3.4
 
 #: Check deparsing only, but from a different Python version
 check-disasm:
 	$(PYTHON) dis-compare.py
 
 #: Check deparsing bytecode only
-check-bytecode: check-bytecode-2.5 check-bytecode-2.5 check-bytecode-3.2
+check-bytecode:
+	$(PYTHON) test_pythonlib.py --bytecode-2.5 --bytecode-2.7 --bytecode-3.2
 
 #: Check deparsing Python 2.5
 check-bytecode-2.5:

test/test_pythonlib.py

@@ -31,7 +31,8 @@ from __future__ import print_function
 
 import getopt, os, py_compile, sys, shutil, tempfile, time
 
-from uncompyle6 import main, PYTHON_VERSION
+from uncompyle6 import PYTHON_VERSION
+from uncompyle6.main import main
 from fnmatch import fnmatch
 
 def get_srcdir():
@@ -212,10 +213,7 @@ if __name__ == '__main__':
             print("Can't find directory %s. Skipping" % src_dir,
                   file=sys.stderr)
             continue
-        if last_compile_version and last_compile_version != compiled_version:
-            print("Warning: mixed python version decompylation")
-        else:
-            last_compile_version = compiled_version
+        last_compile_version = compiled_version
         pass
 
     if not checked_dirs: