Closes #1049

New computed heights for intermediate lines might cause the first attempt
to not actually scroll the desited position into view.

Closes #1043
Closes #1042

Issue #1042

Closes #1044

`markText` changed parameters from v2 to v3

Added .CodeMirror to end of class names so that under CodeMirror v3, the
authors intended BG/FG is used rather than the parent styling seen

Various other style fixes. Updates to comments.

Closes #1026

    Use newlineAndIndentContinueComment by default, falling back to newlineAndIndent if the former command is not defined.
    Same behavior is made default for Enter key in insert mode.

moveByLines was changed to better keep track of the previous
action.  For example, if moveToEol was the previous action,
moving up or down should stay at Eol regardless of line length.

This adds a blankLine method that calls the current mode's blankLine if
it has one. It has allows switching on a blank line if "\n" is specified
for "open" or "close".

See discussion in https://github.com/marijnh/CodeMirror/pull/984

Closes #995

Useful for add-ons that need to register keys.

array initialization (one entry per line) results in extra indentation from second element onwards:
ex:-
const string[] fields = {
  "one",
    "two",
    "three"
};