Clarify licensing terms

[Luke Dashjr]

One location (GitHub) says just OFL. Website says EPL, then OFL (was older EPL, or did EPL remain an option with new versions?). README says EPL 1, EPL 2, and OFL (does that mean one must comply with all 3, or any of the three?).

To me, it seems clear the intent is any of EPL 1, EPL 2, or OFL, but to others, it seems there is a lack of clarity.

Could the authors explicitly answer the correct interpretation of the licensing?

[Ulrich Müller]

ping

[Jonas Stein]

ping 2

[Conrad Kostecki]

ping 3

[Greg Troxel]

ping 4