Servo code organization

Servo components

src/bin.rs: Servo's entry point
src/lib.rs: libservo entry point
components/layout: The layout system.
components/style: The CSS styling system.
components/script: The JavaScript and DOM systems.
components/compositing: The compositor and windowing systems.
components/gfx: Graphics rendering, fonts, and text shaping.
components/net: Networking, caching, image decoding.
components/msg: Message structure definitions for inter-task communication.
components/*_traits: Trait definitions to break crate dependencies.
components/macros: Macros used by the rest of Servo.
components/util: Various utility functions used by other Servo components.

Supporting libraries

These libraries are either internal but used by Servo or external and need special integration:

support/glfw-rs: Wrapping for the GLFW library. Will eventually move to being completely out of tree.
support/rust-task_info: A binding to the task_info library on OS X.

Tests

tests/contenttest.rs: Content (JavaScript) test runner
tests/contenttest: Content tests
tests/reftest.rs: Reference (layout) test runner
tests/reftest: Reference tests
tests/html: Manual test cases and examples
tests/power: Tests for measuring power usage
tests/wpt: Web platform tests and harness

Miscellaneous

etc: Various scripts and files that don't belong anywhere else.
etc/patches: Patches for upstream libraries.