Config variables are defined in both the namespace and package environments, rather than the global environment.
Fix indentation.
Moved data to inst/extdata to follow R packaging guidelines.
Removed unnecessary code from filter.evt.file.parallel (clusterExport stuff) and minor formatting change to best.filter.notch progress output.
First attempt at adding tests with testthat.
Added more tests.  Also testthat.R exits with non-zero status when a test fails.
Added extra checks to avoid warning messages about calling max() on an empty vector.
Remove unneeded print in test.
Merge branch 'testthat'

Conflicts:
	R/filter.R