Almost anyone can play investor now that the Texas State Securities Board has approved rules to regulate the way startups and investors conduct equity crowdfunding. In a 4-0 vote Wednesday, the board approved restrictions designed to enable unaccredited investors to invest as much as $5,000 a year in startups without requiring proof of high-income levels — in exchange for equity. Sites such as Kickstarter.com and Indiegogo.com have been facilitating crowdfunding for years and they do allow almost…