Fix init from select for jQuery >= 1.9
Fix init from select for jQuery >= 1.9

Use correct jQuery API to get option value
Fixes #1016
JHereu/selectize.js,digitalreasoning/selectize.js,brianreavis/selectize.js,selectize/selectize.js,selectize/selectize.js,zeitiger/selectize.js,u01jmg3/selectize.js,ppawel/selectize.js