make Haketilo buildable again (for Mozilla)
How cool it is to throw away 5755 lines of code...
add new root content script
fix license promise typo
improve and test the dafult policy dialog
This commit also fixes some bugs that manifested themselves spuriously.
utilize Pattern Tree to decide the policy to use and modify HTTP response headers according to that policy
This commit also enhances the build script so that preprocessor conditionals can now use operators '&&' and '||'. The features being developed are not yet included in the actual Haketilo build....