added namespace autoload capability

Added capability to load namespaced files (psr-0-like).
Simplify and speed-up search for backslash in File
Fixed bug #19726 : Wrong number of spaces expected after instanceof static
Fixed bug #19727 : PSR2: no error reported when using } elseif {
Merge branch 'master' of https://github.com/goatherd/PHP_CodeSniffer
Updated changelog
Prepare for 1.4.3 release
Added PSR2 ControlStructureSpacingSniff to ensure there are no spaces before and after parenthesis in control structures
Forgot bug ID in changelog
Removed unused code
Fixed typos
PSR1 SideEffectsSniff no longer reports constant declarations as side effects
Sanity check to stop possible infinite loop
Fixed bug #19755 : Token of T_CLASS type has no scope_opener and scope_closer keys
Coding standards fix
Merge remote-tracking branch 'upstream/master'