Modified regular expressions for support wrapping in tags.
Fix regression re: support for mock dates.

`moment(input)` needs to determine if `input` is a date.  The mechanism for
doing this was changed in ab7824f1dcca22bdb8b73f7f98cf660305a73211 to deal with
issue #1084, namely that in a node REPL `globals.Date` may not be the same
`Date` used by moment.

However, this prevents users from changing `Date`, for example by mocking it via
something like [Timecop.js](https://github.com/jamesarosen/Timecop.js).

This commit makes date checking lenient enough to handle both cases.
Merge pull request #1217 from hjdivad/bugfix-tolerate-mock-dates

Fix regression re: support for mock dates.
Modified regular expressions for correct formatting of grammatical cases in Russian language. Escaped symbols doesn't affect the correct format of grammatical cases in pattern 'D[oD]? MMMM?'.
Merge remote-tracking branch 'origin/develop' into develop

Conflicts:
	lang/ru.js
Merge pull request #1195 from jarosluv/develop

Modified regular expressions for support wrapping in tags.