Bugfix/mediainfo other stream type

Fix for:

```
NoMethodError: undefined method `other?' for #<Mediainfo:0x000000055bda60>
	from /var/www/avalon/shared/gems/ruby/1.9.1/gems/mediainfo-0.7.2/lib/mediainfo.rb:504:in `block in parse!'
	from /var/www/avalon/shared/gems/ruby/1.9.1/gems/mediainfo-0.7.2/lib/mediainfo.rb:503:in `each'
	from /var/www/avalon/shared/gems/ruby/1.9.1/gems/mediainfo-0.7.2/lib/mediainfo.rb:503:in `parse!'
	from /var/www/avalon/shared/gems/ruby/1.9.1/gems/mediainfo-0.7.2/lib/mediainfo.rb:412:in `raw_response='
	from /var/www/avalon/shared/gems/ruby/1.9.1/gems/mediainfo-0.7.2/lib/mediainfo.rb:405:in `initialize'
	from (irb):2:in `new'
	from (irb):2
	from /var/www/avalon/shared/gems/ruby/1.9.1/gems/railties-3.2.18/lib/rails/commands/console.rb:47:in `start'
	from /var/www/avalon/shared/gems/ruby/1.9.1/gems/railties-3.2.18/lib/rails/commands/console.rb:8:in `start'
	from /var/www/avalon/shared/gems/ruby/1.9.1/gems/railties-3.2.18/lib/rails/commands.rb:41:in `<top (required)>'
	from script/rails:6:in `require'
	from script/rails:6:in `<main>'
```