- Correctly manage macro-blocks, deleting them when they aren't needed any more.
- Fix a bug in the environment-manager, which makes it more correct. However this increases memory-usage by creating more contexts, so we will need more optimization
- With simplified environment-matching enabled, correctly support files that define completely different content depending on a macro in the header-section, by tracking the preprocessor branching-hash while creating the content-context.
- Add a test for this to test_cppcodecompletion.
- Share include-path lists to save some memory
- Store the content start-line(behind includes) in environment-files. This will give us a place to automatically add new includes, definitions, etc.