Fix problem with log files that have more than one blank lines at the
end.

Change implementation of data type detection

Closes #160

See merge request !183

Fix RT130 data from old firmware can't be read

Closes #153

See merge request !177

Set up tox

See merge request !187

Update Python support

See merge request !184

Fix bug when click on RT130's mass position point

Closes #171

See merge request !197

add <pre></pre> to text in tracking box to preseve space and line break

See merge request !196

fix call to set_axis_info() in add_gap_bar()

Closes #170

See merge request !195

skip retrieving GPS info if no gps_prefix found

Closes #167

See merge request !194