Travis-CI builds fail for macs21 tool (Galaxy 17.01)

[pjbriggs]

The Travis-CI builds are now failing for the pal_finder tool, see:

https://travis-ci.org/fls-bioinformatics-core/galaxy-tools/jobs/197609339

This has first been observed with Galaxy 17.01 release but the problems might predate this release. All the tests fail.

The test failures appear to be related to small differences in floating point values in the tool output e.g.:

--- local_file
+++ history_data
@@ -5,70 +5,70 @@
 chr26	4104449	4105233	1944.00000
 chr26	4105233	4105326	2430.00000
 chr26	4105326	4105398	2916.00000
-chr26	4105398	4105644	3402.00024
+chr26	4105398	4105644	3402.00000
...

[pjbriggs]

No longer seems to be an issue, hopefully solved by migrating to conda (PR #52).