Konch

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- Add ``edit`` command for editing .konchrc file.
- Properly output error messages to stderr.
- Tested on Python 3.4.

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- Fix bug that raised `SyntaxError` when executing konch on Windows.

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- Fix bug in resolve_path that caused infinite loop if config file not found.
- Fix bug with initializing konch in home directory.
- Add ``hide_context`` option.

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- Some changes to make it easier to use konch programatically.
- ``konch.start()`` can be called with no arguments.
- Expose docopt argument parsing via ``konch.parse_args()``.

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- Doesn't change current working directory.
- Less magicks.
- Tested on Python 3.4.

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- Smarter path resolution. konch will search parent directories until it finds a .konchrc file to use.
- Make prompt configurable on IPython and built-in shell. Output template is also supported on IPython.
- *Backwards-incompatible*: Remove support for old (<=0.10.x--released 3 years ago!) versions of IPython.