Xdis

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Overall: Better xasm support, pydisasm improvements

- Was picking up wrong findlabels and findlinestarts in Python 3.5
- Add ARG_MAX_VALUE: the largest operand value before needing EXTENDED_ARG
- Allow lnotab as a dict before code freeze
- pydisasm: don't show Freevars more than once. Do show varnames,
the combined positional + local vars
- change cmp_op values so that they don't have an embedded space
this helps xasm tokenization of COMPARE_OP's operand
- --asm option fixes
- a frozenset is more appropriate for opcode sets

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Overall: Support for bytecode assembler (xasm), Better 3.4-3.6 support

- Add --xasm option to pydisasm. This will output a disassembly
suitable for an assembler, specifically xasm.
- Add magic lookup for 3.4.[0..6] 3.5.[0..2] and 3.6.[0..1]
- Add magic lookup for base versions, e.g. 2.7 or 3.4
- Trap ill-formed python bytecode bettern
- Show timestamp in pydisasm output as it is stored
- Add "optype" field to Instructions. Derived from the has_xxx lists
- Marshaling for Python2 and Python3 code when using cross-version
is aware that the format for the other type is different.
- Add opcode sets corresponding to the opcode has_xxx lists.
- Document Code2 and Code3 a little better
- add Code2Compat and Code3Compat to make cross-version Code creation
easier
- add Code2/Code3 freeze() routine which converts from a
programmer-friendly code object to one compacted and ready for
marshalling or use.
- Correct Python 3.6+ findlinestarts() and findlabels() methods
- Fix _unpack_opargs_wordcode in 3.6
- DRY opcodes more
- Add marshal types that have appeared since Python 3.4 and
start to implement. More work is needed here.

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- Add functions in xdis.bytecode:
has_argument()_, next_offset(), and op_size() functions to
- work with fixed (3.6+) and variable-length (pre 3.6) instructions
- Add magic for pypy3.5

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Python 3.6 bugs/features
- Fix bug in handling operand of opcode after EXTENDED_ARG
- A general mechanism to handle formatting of instruction operands and use
that on Python 3.6+ opcode MAKE_FUNCTION FORMAT_VALUE
- Add missing SETUP_ASYNC_WITH opcode
- Test 3.6 on Travis CI
- compile() return value, "code" no longer has a len. Use "code.co_code"

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- Start supporting Python 3.x dis API functions
This is largely due to Daniel Bradburn (moagstar)
- Expanded tests, bug fixes, and bug fixes for various versions of Python
This is largely due to Kirill Spitsyn

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- add magic for 3.6rc
- Fix Python 3.6 disaseembly of CALL_FUNCTION_EX
- Make magic string values unique
- Note we can now handle Python 2.4 and 2.5