Merge pull request #90 from abbeyj/linkify-macro-refs

Linkify references to preprocessor macros.
Don't fail to ignore a folder if the one before it was also ignored. Closes #84.
Run dxr-worker.py via sys.executable

When dxr-worker.py gets installed, it can lose its execute bit.  Always run it via sys.executable so we don't have to worry about this (and also makes sure we end up running the correct instance of python to boot).
build.py: correct minor typo

reL_path is undefined, the argument is source_path (which was rel_path in the caller).
Merge pull request #98 from mook/build-_unignored_folders-typo

build.py: correct minor typo
Merge pull request #97 from mook/worker-run-via-sys-executable

Run dxr-worker.py via sys.executable
Quit removing HelloWorld-objects, which isn't created anymore.
Merge hyperlinking of class declarations to class definitions. Closes #95.
Merge a better regex for determining the end of tokens, client-side. Closes #92.