Thonny

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* FIXED: Corrected shift key detection (a82bd4d)

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* FIXED: Configuration file was occasionally getting corrupted (for mysterious reasons, maybe a bug in Python’s configparser)
* FIXED 104: Negative font size crashed Thonny
* FIXED 143: Linux installer fails if desktop isn't named "Desktop". (Later turned out this wasn't fixed for all cases).
* FIXED 134: "Open system shell" doesn't work in Centos 7 KDE

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* FIXED: Quoting in "Open system shell" in Mac. Again.

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* FIXED: Quoting in "Open system shell" in Mac.

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* FIXED 106: Don't let user logs grow too big

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* NEW: Added code completion (powered by Jedi: https://github.com/davidhalter/jedi)
* NEW: Added new command "Tools => Open system shell" which opens terminal where current Python is in PATH.
* CHANGED: Single instance mode is now optional (Tools => Options => General)
* FIXED: Many bugs