Py-interface

* Fix a bug in the dist top-level make target

* Add support for Erlang 17.0 maps. Add a configure check for
maps (don't test maps on pre-17.0)
* Move some tests from examples/ to test/ and add a top-level
Makefile target: test
* Add configure checks for eqc[mini] and proper, and run those
tests only if any of them is present.

* examples/run_remote_exec_wrapper.sh,
examples/test_remote_exec.py: Really do include the files that
were expected to be new as of version 1.1.

* examples/run_test_erl_node_pingpong_qc.sh,
examples/test_erl_node_pingpong_qc.erl: Really do include the
files that were expected to be new as of version 1.1.

* ChangeLog: include this file in the tar ball

* py_interface/erl_node_conn.py: Bugfix: now handles incoming
packets larger than 64kbytes.
* examples/run_test_erl_node_pingpong_qc.sh,
examples/test_erl_node_pingpong_qc.erl: QuickCheck test of
pingpong sending of data.
* examples/run_test_erl_node_pingpong.sh: possibility to
parameterize what erl command to use for easier testing of
different version.

* examples/run_remote_exec_wrapper.sh,
examples/test_remote_exec.py: Implemented after a discussion
with HP Wei.

* py_interface/erl_epmd.py: Erlang/OTP epmd R13B04 compatibility
patch by Paul "TBBle" Hampson applied: R13B04 fixed a bug in the
epmd's handling of the `extra' field. This patch makes
py_interface work with the bug-fixed epmd.

* py_interface/erl_common.py: Bugfix of call to _HexDumpFormat in
DebugHex. Reported by Paul "TBBle" Hampson.