Diagnostics

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- *BUG FIX:* Correctly logged traceback if no exception occured.

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- *BUG FIX:* Context code is rendered with correct line number even
when exception is raised from with-statement block.
- *BUG FIX:* Added time and logging level name into log messages.

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- *BUG FIX:* Fixed usage in terminal.
- *BUG FIX:* Fixed reading of JS/CSS file in Python 3. HTML traceback
is properly rendered.

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- *FEATURE:* Removed empty trailing lines from context code.
- *BUG FIX:* Removed duplicated global variables from list of local variables.
- *BUG FIX:* Don't show types/modules/functions in list of local variables.

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- *BUG FIX:* Removed class types, modules and other crap from
list of global variables.
- *BUG FIX:* Function/method variables are ordered according
to function/method signature.
- *FEATURE:* The same exceptions are stored only once
(according to their hash).
- *BUG FIX:* Recover when converting object to unicode raises
exception (e.g. BeautifulSoup).
- *BUG FIX:* Format code context even if code is in binary form
(e.g. lxml).
- *BUG FIX:* Use `repr` function when instance can't be de/en-coded
to the unicode/bytes.
- *BUG FIX:* Tracebacks with the same type of exception and timestamp
are stored to different files.
- *FEATURE:* Added support for with statement.
- *FEATURE:* Added logging support.

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- First public release.