first attempt at parallel IO using multiloops; integrated feature into optiql
fixed false sharing issue in FileStream
changed string splitting for optiql record parsing & fixed multiple bugs related to new FileStreamImpl support, including handling UTF-8 charsets
fixed HashMapImpl modulus bug
moving delite unit tests into delite array dsl
Merge branch 'develop-dmz' of github.com:stanford-ppl/Delite into develop-dmz
Merge branch 'develop-dmz' into optiql-beta
merged with develop
fixing merge bugs and adding ArrayBuffer unit tests
add akamai traceroute app and some optiql convenience methods
fixed nested mutable arrays of records bug for groupBy; added struct byte packing to Delite; alltpch queries functioning correctly
fixed parallel groupBy codegen, reading small files, and control effects not propagating properly during mirroring