refactor rox_compiler into module

rox_compiler/src/lib.rs

@@ -0,0 +1,9 @@
+mod common;
+mod compile;
+mod decompile;
+//export minimal interface
+pub use common::Style;
+pub use compile::CompileConfig;
+pub use compile::compile;//cringe unstandardized interface
+pub use decompile::WriteConfig;
+pub use decompile::DecompiledContext;