control code generation options

[tomerfiliba]

add cmdline switches to agnosc, to control code generation options. for example, turn off casting, turn off reflection, turn on async, etc.

Disabling features:

• -O no-stub -- do not generate server stub
• -O no-casting -- do not generate castToXXX methods
• -O no-reflection -- do not generate INFO_REFLECTION (save space)
• -O no-client -- do not generate client bindings
• -O no-server -- do not generate server bindings

Enabling features:

• -O doc -- include "javadoc" in generate code
• -O async -- generate async versions too
• -O build=/path/to/agnos.jar -- build generated code. if target is java, specify agnos.jar to build with. if target is csharp, specify Agnos.dll to build with.

[tomerfiliba]

disabling features implemented for java