Updated script for digital normalization '03-A22-diginorm.sh' to correctly name and move files.

Problem that khmer assumes Illumina 1.3 fastq format, while our files are in Illumina 1.8. See outstanding [issue](https://github.com/ctb/khmer/issues/23) with [khmer](https://github.com/ctb/khmer/issues/23)/
Started python script "interleave-paired.py" to add /1 or /2 tags to sequence names in interleaved files as recommended for quick hack.
Merge branch 'master' of https://github.com/johnstantongeddes/climate-cascade