Fix parsing of link and meta tags containing non-space whitespace chars

When tokenizing an HTML tag, consider
any unquoted whitespace char a boundary, not just
spaces.
Fix OS X build

The OS X version of 'find' was adding an extra slash
to its output so the paths passed to tsc were in
the form:

  ./<top level dir>//<sub dir>/filename.ts

This caused an error when TSC tried to resolve the paths
to referenced type definition files.

Fix the problem by removing the trailing slash from
the path argument to `find`