Issue #3308

Easiest to see the difference on touch-enabled device. Go to Tern demo
page (link below), click on a variable name and press Ctrl+I. Now pan
the editor's content. The tooltip stays at a fixed position, whilst
the variable name detaches and moves off.

The fix listens to scroll and blur, switching the tooltip off.

Issue #3055

Opening the documentation in the same window navigates away from the
code editor.

Issue #2644

Bumping them for every release just adds too much git
noise and history blowup.

Closes #2000

Create Tern request with optionnal pos to manage for instance tern
hover. See demo at
http://codemirror-java.opensagres.eu.cloudbees.net/codemirror-javascript/demo/javascript-all.html

Closes #1811

Issue #1799

Issue marijnh/tern#200

The name var was getting clobbered in the initial for-in loop, so the
second loop would never be entered.

Closes #1691

+ a few other fixes