Allow cloning ECPublicKey and make its fields pub #195

Job	Run time
Check code formatting	1m 16s
Run static analysis for cargo-ledger	1m 30s
Build SDK (nanos)	2m 4s
Run static analysis (nanos, include_gif)	1m 22s
Build SDK (nanox)	2m 7s
Run static analysis (nanos, testmacro)	1m 20s
Build SDK (nanosplus)	2m 5s
Build SDK	1m 43s
Run static analysis (nanos, ledger_secure_sdk_sys)	1m 56s
Run static analysis (nanos, ledger_device_sdk)	1m 59s
Run static analysis (nanox, include_gif)	1m 33s
Run unit and integration tests (nanos)	2m 41s
Run static analysis (nanox, testmacro)	1m 19s
Run unit and integration tests (nanox)	2m 38s
Run static analysis (nanox, ledger_secure_sdk_sys)	2m 0s
Run unit and integration tests (nanosplus)	2m 38s
Run static analysis (nanox, ledger_device_sdk)	2m 8s
Run static analysis (nanosplus, include_gif)	1m 19s
Run static analysis (nanosplus, testmacro)	1m 22s
Run static analysis (nanosplus, ledger_secure_sdk_sys)	2m 0s
Run static analysis (nanosplus, ledger_device_sdk)	2m 8s
	39m 8s

Provide feedback