lib/simple_json_reader: display better error messages on malformed input

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>
json grammar: fix support for empty strings

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>
lib/curl: prevent C warnings on callbacks

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>
lib/curl: add support for setting the user agent

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>
contrib: intro of a script to find projects using the JNI on github

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>
tests: add github_search_for_jni to testfull.sh

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>
Merge: Contrib: Github search tool to find JNI using projects

Pull-Request: #380
Reviewed-by: Jean Privat <jean@pryen.org>