* core, trie: rework trie database * trie: fix comment
* cmd, core, eth, les, light: track deleted nodes * trie: add docs * trie: address comments * cmd, core, eth, les, light, trie: trie id * trie: add tests * trie, core: updates * trie: fix imports * trie: add utility print-method for nodeset * trie: import err * trie: fix go vet warnings Co-authored-by: Martin Holst Swende <martin@swende.se>