Update README - Fix github URL

Fix github URL

From:

https://github.com/dsully/perl-audio/tree/master/Audio-WMA

To

https://github.com/dsully/perl-audio-wma

https://rt.cpan.org/Public/Bug/Display.html?id=91456
Update WMA.pm

Fix github URL

From:

https://github.com/dsully/perl-audio/tree/master/Audio-WMA

To

https://github.com/dsully/perl-audio-wma

https://rt.cpan.org/Public/Bug/Display.html?id=91456
Merge pull request #1 from MartinMcGrath/master

Fix github URL