Update Compiler.php

Add feature "Check require extensions orther when build your extension"
Update Config.php

Add info "require extension" to init config.json
Update Compiler.php
Update .travis.yml
Update Compiler.php
Update Compiler.php
Update Compiler.php
Update Compiler.php
Update Compiler.php
Update .travis.yml
Merge pull request #626 from MaxZephir/require-extensions

Added feature "Require other extensions"  when build extension