Remove dependency to spring

[d-r-q]

We can read annotations directly from bytecode without class loading, so we should remove dependency to spring to avoid conflicts

[d-r-q]

In java 8 annotations are optional and if at runtime annotation class is not found, then no errors are occurs. So we can rewrite restler to read annotations from byte code and suggest users to use provided scope of spring-mvc dependency in module with controllers

[d-r-q]

At first step we can use some third-party library asm, but then we can implement custom bytecode parser (#101)