Moved ptrie => trie. Removed old trie

core/types/derive_sha.go

ptrie/iterator.go

ptrie/trie.go

ptrie/trie_test.go

state/state_object.go

state/statedb.go

tests/helper/trie.go

trie/cache.go

trie/fullnode.go

trie/hashnode.go

trie/iterator.go

trie/iterator_test.go

trie/main_test.go

trie/node.go

trie/shortnode.go

trie/trie.go

trie/trie_test.go

trie/valuenode.go

types/ethereum.go