[buildscript] Added option compile_incremental to enable incremental java compilation

Issue #46 buildscript rewritten: ...

Git-tag based semantic versions #46
Removed forge-gradle dependency
Gradle 2.10
Client/server dependencies splitting
New maven publishing scheme (client/server/dev project splitting)

Closes #38 Реализовано разделение сборки на клиентскую и серверную составляющие