Thonny

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* Removed StartupNotify from Linux .desktop file (StartupNotify=true leaves cursor spinning in Debian)

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* Added some Linux-specific files to source distribution. No new features or fixes.

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* Temporary workaround for 351: Locals and name highlighter occasionally make Thonny freeze
* Include only required licenses in source dist

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* FIXED 303: Allow specifying same interpreter for backend as frontend uses
* FIXED 304: Allow specifying backend interpreter by relative path
* FIXED 312: Closing unsaved tab causes error
* FIXED 319: Linux install script needs quoting around the path(s)
* FIXED 320: Install gets recursive if trying to install within extracted tarball
* FIXED 321: Linux installer fails if invoked with relative, local user path
* FIXED 334: init.tcl not found (Better control over back-end environment variables)
* FIXED 343: Thonny now also works with jedi 0.11

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* FIXED 31: Infinite print loop freezes Thonny
* FIXED 285: Previous used interpreters are not shown in options dialog
* FIXED 296: Make it more explicit that pip GUI search box needs exact package name
* FIXED 298: Python crashes keep backend hanging
* FIXED 305: Variables table doesn't get updated, if it's blocked by another view

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* NEW: More flexibility for classroom setups (see https://bitbucket.org/plas/thonny/wiki/ClassroomSetup)
* FIXED 276: Copy with Ctrl+C causes bell
* FIXED 277: Triple-quoted strings keep keyword coloring
* FIXED 278: Paste in shell causes bell
* FIXED 281: Wrong unindentation with SHIFT+TAB when last line does not end with linebreak
* FIXED 283: backend.log path doesn't take THONNY_USER_DIR into account
* FIXED 284: Internal error when saving to a read-only folder/file (now proposes to choose another name)