- Fixing errors in results filtering

- Major rewrite of indexing logic for persistent store

- Adding performance tests

- Small fixes

- Fixing error in composed EXISTS filters

- Fixing error in binding of FILTER expressions

- Fixing issues with flags in REGEX filters

- Making it possible to register custom functions using URIs

- Fixing error left outer join of optional BGP with Zero pattern

- Fixing error in filter aggregation and DISTINCt
- Fixing useless specs

- Fixing bug in filter exists/not exists expressions.

- isURI, isIRI and isLITERAL are valid functions

- nextTick is used in utils/eachSeries
- Fixing indexedDb transactions terminating before being used.

- Adding BIND support

- Improving yielding of the stack

Version 0.9.8