Invalid request if timeUrl contains a query parameter

[jkmatila]

EvaporateJS uses an invalid URL for fetching the time if the timeUrl already contains query parameters. It will just append the request time at the end of the URL separated by a ? even if
query parameters already exist. See here: evaporate.js:152.

Steps to reproduce:

Set timeUrl to http://example.com/time?anotherparam=foo

Expected:

EvaporateJS should get http://example.com/time?anotherparam=foo&requestTime=...

Observed:

EvaporateJS gets http://example.com/time?anotherparam=foo?requestTime=...

[jakubzitny]

Yeah this looks incorrect, PR with a fix would be very appreciated 😇