SortScan can now work on column names (not just on column indices)
adds parameterized loading and executeAndWait with optional transaction id

 * parameters are in the form of: %(<name>)<width>[d/i/f/s]
adds support for between expression called from json interface
fixes tpcc table issues

 * W_STREET1/2 => W_STREET_1/2 (as in tpcc specification)
 * W_TAX and W_YTD to D_~ in DISTRICT TABLE
 * name of loaded tables to upper case (used them in my queries) 
* removed UTF8 BOM from tbl files (the hyrise loader doesn't like them) 
* corrected O_IDs in NEW_ORDER  * better D_NEXT_O_IDs (not 3001 but max(o_id) + 1) 
* O_D_ID to existing D_IDs (always 1) 
* orderlines for every order 
* existing I_IDs for O_I_ID
adds TpccExecutionTest with json queries