Adapt to ES6 modules

[kewisch]

Hey @darktrojan @leftmostcat @metasansana Here is my ES6 adaption of the library. I'd love to get this merged before we do any other major work, rebasing just the few changesets was a pain an prone to failure. I can help adapt pending PRs afterwards.

With the amount of changes you'll have to see how much review is useful, be sure to ignore whitespaces while reviewing, it will save you about 5k lines and makes reading easier!

[coveralls]

Pull Request Test Coverage Report for Build 3253589896

• 7754 of 7879 (98.41%) changed or added relevant lines in 20 files are covered.
• 28 unchanged lines in 2 files lost coverage.
• Overall coverage increased (+2.7%) to 98.137%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
lib/ical/parse.js	472	474	99.58%
lib/ical/time.js	1075	1078	99.72%
lib/ical/timezone.js	436	440	99.09%
lib/ical/recur_expansion.js	390	398	97.99%
lib/ical/recur_iterator.js	1001	1109	90.26%

Files with Coverage Reduction	New Missed Lines	%
lib/ical/recur_expansion.js	3	97.22%
lib/ical/recur_iterator.js	25	89.41%

Totals
Change from base Build 3012316465:	2.7%
Covered Lines:	9201
Relevant Lines:	9360

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💛 - Coveralls

[darktrojan]

I haven't got the available time or sanity to go through this line by line, but I've scanned through it and pointed out the things that stood out. I didn't really take much notice of changes outside lib and test as others have already had a look and TBH they probably know more about those things than I do.

As long as the tests pass and you pick up the missing bit of stringify.property I found then I approve. It would be useful if you put this into Thunderbird (even hacking it in temporarily) and ran the tests there, including the address book tests that handle vCards.

[kewisch]

It would be useful if you put this into Thunderbird (even hacking it in temporarily) and ran the tests there, including the address book tests that handle vCards.

I was much hoping someone from the team could test this in Thunderbird, I don't have the setup currently so it would take me a bit to get back into the groove.