Add a optional json dump state to evm-bin (#9706)

* Add a dump of the state at the end of transaction for --json-test.
Also fixes json-test output on finish, and allow to put both on err or
out (--out-only and --err-only).

* Dump state resolution from trie, function behind evm-bin feature to avoid misuse.

* Rename 'slow' method to 'to_pod_full'.
Use cache first in 'to_pod_full', for in between commits case.
Change dump activation to use a function pointer instead.

* Fix tests.

* Query and add storage values to dump.

* Switch to use `require` method, even if less efficient it is better in
this case to reuse existing code.
Reuse of `storage_at` was not easy in this case (could not iterate and
use the method at the same time (refcell mutable borrow panics) so
keeping code as is.

* Switch to returning error.
Use 'base_storage_root' instead of 'storage_root'.
Added a test, it will only execute with json-test in ci, or when launch
with the feature.

* Renaming of command line parameters.
Comments fixes.
Minor code changes.

* Fix evmbin cmd parsing test.

* README update.

* Fix extra space and avoid clone call on copiable address.

* Revert test submodule.

* Revert wasm-test submodule.

* Use map_or instead of map + unwrap_or

* restore tests submodule

ethcore/wasm/run/src/runner.rs

@@ -66,7 +66,7 @@ impl Fail {
 }
 
 impl fmt::Display for Fail {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+	fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
 		use self::Fail::*;
 		match *self {
 			Return { ref expected, ref actual } =>