Add installation step of "C++ Toolchain" on Fedora
Merge pull request #2609 from Bengt/patch-1

Add installation step of "C++ Toolchain" on Fedora
Upgrade to atom-shell@0.13.1
Mention debugging guide in contributing guide
Add overview to debugging guide
Upgrade to markdown-preview@0.79
Upgrade to language-ruby@0.28.0
Upgrade to tree-view@0.101
Handle mousedown events only for left button in editors
Update markdown-preview@0.80
Upgrade to settings-view@0.122
Delete fixtures for force re-checkout
Remove fixtures cleaning
Upgrade to settings-view@0.123
Fail on windows if specs fail
Upgrade to settings-view@0.124
Upgrade to setings-view@0.125
Upgrade to settings-view@0.126
Merge pull request #2626 from atom/iz-mousedown-events-on-left-click-only

Handle mousedown events only for left button in editors
Upgrade to language-ruby@0.29