Switch to PHP

[at15]

.... I am tried of using java, btw since we are rewriting tongqu in PHP7, some code in this project could be used in new tongqu5. The project will be using PHP7 and a self made framework

• [x] remove all java code
• [x] update ignore
• [x] init composer file
• [ ] init framework
• [ ] finish user login

tests and lint

• [ ] codeception
• [ ] phan https://github.com/etsy/phan

debug

• [ ] https://github.com/maximebf/php-debugbar We can reuse its collector code
• [ ] https://github.com/borisrepl/boris PHP repl
• [ ] https://github.com/bobthecow/psysh another PHP repl, laravel has it included in its command line
• [ ] https://github.com/patrickallaert/php-apm performance monitor tools, seems supporting php
• [ ] https://github.com/phpbench/phpbench

[at15]

should merge with #8