Fix regex for REST API version detection

@27.0.9

Add support for two character instance ids

@27.0.8

Set User-Agent for github version checks

Add mobile1.t.salesforce.com to instance list @27.0.6

remove runAllApexTests.php

add back " == false" to CSV count() check. Fix #609 @27.0.4

findOAuthConfigByClientId

Use $soqlQuery in async future

#607

remove equal sign from _handle_logs_stdout

set API 27.0 as default