Added read2 overload of read to read two mods at the same time
removed tree-reduce and added randomized reduce
added lift operation
Merge remote-tracking branch 'upstream/master'
Added dummy lift feature to TBD
Working random reduce, however something seems to go wrong.
Implemented reduction algorithm as discussed, randomization works now using Umut's hashing algorithm.
Merge pull request #10 from emiswelt/master

Added read2 overload of read to read two mods at the same time