Merge Round methods

[fjarri]

• Merge Round::id(), possible_next_rounds() and may_produce_result() into transition_info(). Fixes More consistent handling of out-of-order messages #78
• Merge Round::message_destinations(), expecting_messages_from() and echo_round_participation() into communication_info(). With the previous item, fixes Merge some of the Round methods #69.

[coveralls]

Pull Request Test Coverage Report for Build 13401846642

Details

• 167 of 222 (75.23%) changed or added relevant lines in 8 files are covered.
• 13 unchanged lines in 1 file lost coverage.
• Overall coverage decreased (-0.4%) to 73.193%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
manul/src/session/session.rs	24	25	96.0%
manul/src/combinators/chain.rs	10	12	83.33%
manul/src/session/evidence.rs	6	9	66.67%
manul/src/protocol/round_id.rs	92	141	65.25%

Files with Coverage Reduction	New Missed Lines	%
manul/src/session/tokio.rs	13	82.38%

Totals
Change from base Build 13249464815:	-0.4%
Covered Lines:	2288
Relevant Lines:	3126

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💛 - Coveralls

[dvdplm]

Overall a nice cleanup. Left a few nitpicks.