* introduce code node
* replace codeMap with code touches
* fix a comment
* fixups to tests
* fix compile error
* fix getnodedata tests
* add tests and test stubs
* add more test stubs
* add test method bodies
* add and fix more tests on trie for new codenode
* add test change code between blocks
* fix crash in stateless
* remove unneded files
* remove comment
* fix deleted account code
* fix resolve set builder for code nodes
* add env INTERMEDIATE_TRIE_CACHE
* try to use assert.New() pattern
* Fix "maligned" linter warnings to reduce space consumption of structs:
core/types/accounts/account.go:18:14: struct of size 136 bytes could be of size 128 bytes (maligned)
type Account struct {
--
trie/node.go:44:10: struct of size 80 bytes could be of size 72 bytes (maligned)
duoNode struct {
--
trie/resolve_set.go:28:17: struct of size 56 bytes could be of size 48 bytes (maligned)
type ResolveSet struct {
--
trie/resolver.go:34:15: struct of size 88 bytes could be of size 72 bytes (maligned)
type Resolver struct {
--
trie/visual.go:32:17: struct of size 104 bytes could be of size 96 bytes (maligned)
type VisualOpts struct {
