dryruby / ebnf / 183

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travis-ci

* Add `Base#validate!, Base#valid?`, `Rule#validate! and `Rule#valid?`.
* Update Turtle generation to use rule sym as identifier, and id as dc:identifier.
* Fix RANGE and O_RANGE EBNF terminals.
* Improve code coverage.
* Improve error checking in `Rule#initialize`.
* Allow `diff` (`a - b`) to be used with non-termainals in PEG parsing.
* Added `not` and `rept` operators (not used directly by EBNF grammar, just yet).
  * Eventually, a syntax such as `A{1*2}` could be at least one and at most to of `A` are matched.

117 of 117 new or added lines in 5 files covered. (100.0%)

1465 of 1574 relevant lines covered (93.07%)

18683.24 hits per line