Support text-align-last

[yisibl]

http://www.w3.org/TR/css3-text/#text-align-last-property

Value:  auto | start | end | left | right | center | justify

IE must be set: text-align: justify and not support start | end value.

DOC

• MDN: https://developer.mozilla.org/en-US/docs/Web/CSS/text-align-last
• webplatform: http://blogs.adobe.com/webplatform/2014/02/25/improving-your-sites-visual-details-css3-text-align-last/
• MSDN: http://msdn.microsoft.com/en-us/library/ie/ms531163%28v=vs.85%29.aspx

Browser support

IE: 5.5+
Chrome: 35+ (chrome://flags/#enable-experimental-web-platform-features)
Firefox: 12 + -moz
Opera: 22+
Safari: No

[ai]

I created PR to Can I Use #372

[ai]

Fixed ai/autoprefixer-core@993a2a5