Closure immutability
Update 14-classes.md
Added examples for division by zero
added notice about diagnostic
Clarify how interface/abstract method signatures may differ
add phpt test
Merge branch 'pull-request/80' into PHP-5.6
Expression fixes
Merge branch 'pull-request/83' into PHP-5.6
improve compatibility description
Merge branch 'pull-request/78' into PHP-5.6
add pr #67
pr #73
Merge branch 'expressions-fixes' into PHP-5.6
Described the behaviour of hidding local/global variables, function statics with the same name
improvements due to feedback from @smalyshev
fixed typo
Merge branch 'global-static-variables' of https://github.com/robstoll/php-langspec into global-static-variables