added add techniques, removed repeat macros in recsys_alternatives
refactored some code
added inventory file, changed addTech to use inventory example
put filtering at end of get recommendations for II, changed weight of similar genre to lessen effect
removed book data
rewrote removebot technique to use inventory example
Added diversify items tech
added diversiy user item example, added modify technique example
changed inventory to have stock, added inSTock technique, added popularity boost technique
modified java udf for user-item recs to handle String instead of integer, stripped diversify user item tech
renamed examples
removed extra file
changed casing for PIG key words, fixed according to comments
added filter to check for source items
refactored source_items to available_items
changed default parallel to 18
Merge pull request #1 from mortardata/cngan_integrate_technique_examples

[#66013878] integrate technique examples