RoundId changes

[fjarri]

• added conversion from u8 to RoundId and comparison of RoundId with u8.
• renamed Round::entry_round() to entry_round_id() and made it mandatory to implement. This helps avoid bugs when making combinators (like the one fixed in chain)

[coveralls]

Pull Request Test Coverage Report for Build 12621866283

Details

• 8 of 13 (61.54%) changed or added relevant lines in 3 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage decreased (-0.05%) to 69.981%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
manul/src/combinators/chain.rs	2	4	50.0%
manul/src/combinators/misbehave.rs	0	3	0.0%

Files with Coverage Reduction	New Missed Lines	%
manul/src/combinators/chain.rs	1	56.49%

Totals
Change from base Build 12621719975:	-0.05%
Covered Lines:	1830
Relevant Lines:	2615

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💛 - Coveralls