Issue #2054

Issue #2054

Closes #2059

Closes #2039

Closes #2040

Needed for some modes to load.

Closes #2054

Fixes #2011 in at least IE8+.

When the resize-to-content styles are applied along with a removal of vertical padding on .CodeMirror-lines, IE would not display any content. Using `offsetWidth` instead of `clientWidth` fixes this for modern-ish IE.

A more complex solution is needed to solve it for older browsers.

... to make a single-click pick a hint option instead of just
selecting it.

Closes #2050

All tests now check whether indentation from mode corresponds
to the indentation in the test source. test.indentation is
gone.

Issue #2049

Issue #2048

Closes #2048

Passing options causes issues in jshint since lint options are also
passed. These options cause bad option errors in the annotation list.

Closes #2047

Closes #2046

Add getHelpers and registerGlobalHelper, allow modes to specify arrays
of helper names, support modeProps in mode specifications.

Update foldcode and show-hint to make use of more powerful helper
system by defining an `auto` helper that tries multiple helpers, and
using that as default.

Also moves handling of electricChars to readInput, removing
the timeout kludge.

Issue #2029

Using the cursor itself was awkward already, but turns out to
also have strange effects (it was somehow treated as having height: 0
in some situations, by all browsers).

Closes #2042

And update Light Table link

Closes #2037

To make sure it isn't seeing comments that are actually
strings.

Issue #1975