Fix regexps for reference resolution block
Fix regexp for URL within <angle brackets> in a link
Should also remove backslashes that escape symbols

(Mainly because '<' and '>' are in the symbols Unicode category)
Revert "Add Google Analytics tracker"

This reverts commit 21f2e97c8a6aada9be1b58e06a32abad2a212832.

Let's not do any tracking anymore.