This adds tests for names available as public symbols
in the modulegraph2 namespace.

This also removes all incomplete and untested symbols
from the public API (will be added back when I'm
happy about the implementation)

Including full tests. The code doesn't use ast.NodeVisitor to avoid
running out of stack space.

The tests have 100% test coverage according to coverage.py,
but I haven't checked yet if there is sufficent testing.

One thing I don't quite like is a spurious return statement that's
needed to keep coverage.py happy.

I'm not happy about the naming in modulegraph._depproc, and
the global function '_process_namelist' (this should be a method
given its close interaction with ModuleGraph)

The actual export is less interesting, graphs get complex very fast...

…t statement is slightly different

This needs a lot more testing, as well as checking
if the code doesn't do to much work (instead of using
importlib functionality)

Six.moves support does not work properly at this point, which
may sadly enough be a bug in the rest of the code...

This is mostly handling error cases, six.moves support is
not complete yet.

This was initialy a function because I hoped to move this
to a different module. Can't be done because this uses internal
APIs for the graph.

…dulegraph

2) Fix incorrect value in the STDLIB_IMPLIES dictionary

3) Add testcase that validates the STDLIB_IMPLIES dictionary

* Add support for SWIG (untested)
* Update missing_hook to make the SWIG hook possible
* Add function "distribution_named"

One case is not yet handled: The SWIG generated file as
a package __init__. I don't know if that's actually used though.

- Document the command-line interface
- Remove objectgraph documentation
- Make sure documentation builds again

- Test coverage for _depproc
- Rewrite _implies to avoid conditional statements
- Update test_distributions for the incompatiblity between
  current versions of wheel and pip

…nd syntax errors)

... and fix the error this test causes

…ping on the work stack.

* Move utility definitions from _modulegraph2 to _utilities

* The method _run_post_processing is not necessary, inline in
  the single caller.

* Merge common codes for absolute and relative imports
  in _process_import

1) Dotbuilder is currently not sufficiently generic, make
   function attributes non-optional to get optimal code coverage
   without full testing

2) Tweak the default graph for test_commandline to cover all
   code paths during HTML generation

In both cases a generic graph exporter is needed with tests,
which is then used by modulegraph.

The "as" clauses are only parsed for modules with available
source code, not for modules that only have byte code.

With this change having a SWIG wrapper as __init__.py should
work correctly (even though it is unlike that anyone will do this)

…veyor logs)

…ecific definition for 3.6

Also enables python3.6 testing by default in tox.ini