fix: Clarify naming

[epage]

Based on #95 and includes:

• binary includes:
  • number
  • bits
  • multi::length_*
• bytes -> token
• character -> ascii
• combinator includes
  • multi
  • sequence
  • branch
• Parser::map_res -> Parser::try_map

Still don't have a better name for tag or alt...

[coveralls]

Pull Request Test Coverage Report for Build 4824141511

• 180 of 384 (46.88%) changed or added relevant lines in 11 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage decreased (-2.02%) to 50.789%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/ascii/mod.rs	1	4	25.0%
src/branch.rs	0	3	0.0%
src/parser.rs	4	8	50.0%
src/sequence.rs	0	4	0.0%
src/bits.rs	0	6	0.0%
src/multi.rs	0	16	0.0%
src/character.rs	0	25	0.0%
src/combinator/core.rs	44	79	55.7%
src/number.rs	0	42	0.0%
src/combinator/parser.rs	115	181	63.54%

Files with Coverage Reduction	New Missed Lines	%
src/lib.rs	1	20.0%

Totals
Change from base Build 4822221633:	-2.02%
Covered Lines:	1288
Relevant Lines:	2536

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💛 - Coveralls