Feature request: Support speaker name alias

[Mariatta]

I understand currently only one name per speaker is allowed. I'm wondering if it would be possible to support alias for people who might have "stage name", using non-latin alphabets, or different name due to life events.

Examples of such speakers:

• Laurens van Houtven aka lvh
• 郭學聰 aka Hsueh-Tsung Kuo
• Danny Greenfeld aka Daniel Greenfeld aka Daniel Roy Greenfeld aka Daniel Feldroy
• Mariatta Wijaya aka Mariatta

Proposed solution:

• support a new metadata: speaker alias
• associate the talk with all speaker names including the alias
• in the speaker listing page, the speaker may be listed multiple times under different alias, but all alias points to one speaker page.