Adds optional specification of node name to slave file
Merge pull request #12 from pregelix/slave_file_extension

Adds optional specification of node name to slave file
Write results to Asterix
Minor changes and fixes to Asterix read
Code Cleanup
More stable datatype transformation
Travis to download and install latest asterix snapshot
Change of way asterix paths are saved
small fixes
Small bugfixes, includes fix for null values