Add gseagen files with new km3net-dataformat.

See merge request !6

Adding a mupage file

See merge request !5

KM3BUU Testdata

See merge request !4

Update corant_5.1.7.evt -> corant_5.1.9.evt

See merge request !3

Resolve "Python 2.7 compatibility"

Closes #2

See merge request !2