Set minimum height for ship data. #15

[ci skip]
Compile CSS.

fixes #15
[ci skip]
Merge branch 'feature/15_printout_vertical_space'
Selecting Fancy or Simple affects printout.

* Remove 'Print' button; merged with 'View as Text'.

fixes #21
Make vertical space in printout optional.

fixes #22
Merge remote-tracking branch 'upstream/master'