Fix & Improve MediaInfo::Tracks::Attributes.standardize_to_milliseconds.

[01max]

Fix the incorrect results of MediaInfo::Tracks::Attributes.standardize_to_millisecond class method.

The 'minute' regex was triggered by some ms values & the regex used for the scan of the input string was not splitting elements not separated by a space.

Leading to these kind of results :

multiple_streams_no_stream_id_three_video.xml

<Duration>4s 170ms</Duration>
4*1000 + 170 = 4170
previously wrong output : 10204000

vimeo.57652.avi.xml

<Duration>15s 164ms</Duration>
15*1000 + 164 = 15164
previously wrong output : 9855000

I also simplified the switch case by optimizing the regular expressions used for the hours / minutes / seconds, and added a support for iphone .mov specific duration format (ie. 164.536)

I'm joining a test & benchmark output for these updates : test_and_benchmark_output.txt

[NorseGaud]

Great catch and solution. 1.1.0 pushed