changed license from MIT to MPL 2.0

emul: ratio for figure position, changed api for :figure-repeat ini

emul: options map argument for CA constructor/generator functions

bumped build/deploy tools, added pom template for jar generation

changelog update for 0.2.0

docstring optimizations, notebook build changes, readme updates

introduction notebooks: some corrections and small changes

expr: some cleanup & test improvements

added tests for expression predicates & specs

updated changelog to reflect the recent change

expr: removed simplify-op & simplify-sym, fixed some docstrings

emul: renamed :ball-inverted to :hole in ini-patterns

Updated changelog to reflect changes in last commit

expr: changed to env-last in interpret function apis

calc: renamed X-partial-dna-assuming-holes-equal? to X-partial-dna?