renamed module name from minimap2 to mmappy

minimap2 clashed with minimap2 from conda

python/mm2-lite.py

@@ -1,7 +1,7 @@
 #!/usr/bin/env python
 
 import sys, getopt
-import minimap2 as mm
+import mmappy as mm
 
 def readfq(fp): # multi-line fasta/fastq parser
 	last = None