feat: use epic and epic-wallet subtrees

TODO: push to cypherstack/epicboxlib repo

Author: sneurlax

rust/epicbox/epicboxlib/Cargo.toml

@@ -24,5 +24,5 @@ ws = { version="0.9.2" }
 
 grin_secp256k1zkp = { version = "0.7.4", features = ["bullet-proof-sizing"]}
 
-epic_core     = { git = "https://github.com/EpicCash/epic", branch = "master" }
-epic_wallet_libwallet = { git = "https://github.com/EpicCash/epic-wallet" , branch = "master" }
+epic_core     = { path = "../../epic/core" }
+epic_wallet_libwallet = { path = "../../epic-wallet/libwallet" }