Issue #874 - Adopt DPF as xml file suffix
Issue #874 - Adopt DPF as xml file suffix
Issue #874 - Removing unnecessary content type
Merge branch 'issue874' of https://github.com/pecko/debrief into issue874_PDF
improve wording
minor text change
Merge pull request #899 from debrief/issue874_PDF

Issue874 switch to DPF format
switch to DPF in user guide
switch to DPF in cheat sheets
remove unnecessary extra file type - hopefully @pecko doesn't find a problem with it.
switch sample data from XML to DPF
Merge pull request #900 from debrief/issue874_dpf_part2

Issue874 switch to DPF, documentation & sample files
Switch to EPL