Smart-contract inspection and instrumentation. (#165)

* Extract mock module.

* Wasm smart-contract instrumentation

* Rebuild binaries.

* Memory limits and tests.

Author: pepyakin

Cargo.lock

@@ -18,9 +18,12 @@ substrate-runtime-primitives = { path = "../primitives", default_features = fals
 substrate-runtime-consensus = { path = "../consensus", default_features = false }
 substrate-runtime-system = { path = "../system", default_features = false }
 substrate-runtime-session = { path = "../session", default_features = false }
+parity-wasm = { version = "0.30", default_features = false }
+pwasm-utils = { version = "0.2", default_features = false }
 
 [dev-dependencies]
 wabt = "0.1.7"
+assert_matches = "1.1"
 
 [features]
 default = ["std"]
@@ -37,4 +40,6 @@ std = [
 	"substrate-runtime-primitives/std",
 	"substrate-runtime-session/std",
 	"substrate-runtime-system/std",
+	"pwasm-utils/std",
+	"parity-wasm/std",
 ]