More precise parsing with an array of formats

[Timrael]

Commit 1:
When moment parses string with a few formats, only last part of unparsed string has influence on format penalty. For example, for string '11-02-10', formats 'MM DD YY' and 'DD-MM-YY' have same penalty, and it's 0. But as you can see, they have different separators ' ' and '-', that should have influence on penalty.
Now moment can distinguish those separators, and our formats ('MM DD YY' and 'DD-MM-YY') will have penalty 2 and 0 respectively.

Commit 2:
In gettings regex for token, special RegExp chars, such as point, slash, etc, should be escaped to prevent positive matching with other separators. For example, for string '11-02-10', format 'MM.DD.YY' has 0 penalty, because RegExp('.') positive mathes with '-'.
Now moment escapes the chars and our format will have penalty 2.

[ichernev]

Looks good. But how do you make sure that if the format is 'MM-DD-YY' and the string is '01-01-01' there is no penalty?

[Timrael]

It looks how many chars was unparsed and increases penalty by this number. In your case there is 0 unparsed chars.

MM => 01
- => -
DD => 01
- => -
YY => 01

[ichernev]

Ah right, non formatting tokens are matched by the formatting tokens regexp :)

OK, this looks pretty good! Merging!