Convert timezone/location/time information

[Masterxilo]

DTSTART;TZID=America/New_York:20130802T200000
DTEND;TZID=America/New_York:20130802T203000

is converted to

    startDate: '20130802T200000',
    endDate: '20130802T203000',

This datetime conversion:

• is not ready for being used in js (e.g. converted to Date): new Date('20130802T200000') gives Invalid Date
• loses the timezone information (TZID)

A better format might be: DTSTART;TZID=America/New_York:20130802T200000 is converted to

dtstart: {
original: "20130802T200000",
tzid: "America/New_York",
toISOString: "2019-08-06T08:58:13.614Z" // time is just an example
}```

* consider to preserve the original key name "DTSTART/dtstart" -> there is no reason to change all of them
* in any startDate is not a correct translation, because the key includes a time


Required for #8

[AleixFerre]

This just happened to me aswell. Is there any solution to fix this easily?