Add names to the message loading daemon threads.

[Capstan]

Fixes #27

[KevinKeul]

Hello @Capstan ,

first of all, thanks for keeping up with this library here, json-schema-validator and all of java-json-tools! I really appreciate your effort.

As i am currently using json-schema-validator i came across this problem of unnamed threads. I observed, that the current version (as of commit 8e46ad4) already sets the thread names, but it is not yet included to the package on maven.

Is it possible to deploy the current version of the msg-simple library (including 8e46ad4) to maven? This would really help me.

Many thanks in advance and
best regards