Nevada Gov. Brian Sandoval on Wednesday unveiled a record $6.5 billion General Fund budget for the next two fiscal years that is balanced by extending most of the tax increases and revenue diversions put in place two years ago.The spending plan proposed by the first-term Republican governor is $342 million, or about 5 percent, more than the current budget. Nearly all of the increased spending would go to K-12 education and Health and Human Services programs — primarily for a huge increase in Medicaid spending. The plan assumes a gradually improving economy, with “light at the end of the tunnel,” …