Add a runtime for general trigger event

[sabmeua]

It implemented another bootstrap for other than web server purpose (to consume events of SQS, Kinesis, ..etc).

• Add make rule for building general event env.
• Add new bootstrap and php files to process general event.
• This runtime is naively ported ruby2.5 env.
• Change the handler specification rules as "FILENAME.METHOD" or "FILENAME.CLASS.METHOD" same as in other language.

I concern this may not be appropriate for PR, as it has largely fragmented the code.
If you are interested in this and can accept it even partially, I will rework this PR.