Ask for python 3.7

.gitignore

@@ -11,3 +11,5 @@
 /sample/
 /save.temp/
 /obitmp/
+/MANIFEST
+/dist/

setup.py

@@ -52,7 +52,7 @@ EMAIL       = 'eric@metabarcoding.org'
 URL         = "metabarcoding.org/obitools3"
 LICENSE     = "CeCILL-V2"
 DESCRIPTION = "Tools and library for DNA metabarcoding",
-PYTHONMIN   = '3.6'
+PYTHONMIN   = '3.7'
 
 SRC       = 'python'
 CSRC      = 'src'