simple_json_reader: privately imports lexer&parser

So public API is easier to read.

Signed-off-by: Jean Privat <jean@pryen.org>
lib/github_api: new lib to access the github api

Signed-off-by: Jean Privat <jean@pryen.org>
contrib/github_search_for_jni: update to use github_api

Signed-off-by: Jean Privat <jean@pryen.org>
contrib: add `github_merge` the script I use to produce merge of PR

Signed-off-by: Jean Privat <jean@pryen.org>
tests: add github_merg

Signed-off-by: Jean Privat <jean@pryen.org>