add basic data structures for more complex queries
add aima-core to pom and include example of advanced query
add getters and custom PropositionSymbol that contains the actual Condition
add proposition mapper
start work on advanced query builder
remove aima requirement for symbols to have valid java identifier as name
get AdvancedQueryBuilder to build ClauseNode tree
fix failing unit test
switch to stripped down aima-core
refactor query builder
query can now normalize to cnf and extract conditions
fix IN queries and some unit tests and benchmarks
bracket complex sentences
get benchmarks running again