v0.1.6

New evaluator refactored into set of operation classes.

v0.1.5

Lexer file structure changed and unnecessary exceptions removed

v0.1.4

Fixed PHP 5.6 incompatibilities

v0.1.3

Data cursor advancers implemented to simplify reference evaluators

v0.1.2

OPTION_NUMERIC_INDEX_GAPS implemented and supported with tests

v0.1.1

Badges and requirements info added to README.

Initial release

v0.1.0

Initial commit