HTMLdoc v1.5.0

This release adds some new document anipulation methods, and fixes a bug:

• Added htmldoc::before() and htmldoc::after()
• Added tests
• Fixed issue where if you removed nodes with tag::remove(), it caused issues in text::minify() because it expects the keys to be sequential. It now re-keys the children after the node has been removed
• Updated dependencies to fix issue with undefined in JSLite