changes for Dancer2 v0.10

Fixes #2
Fixes #3
bug report
add contributors
mailmap
v1.5.2

 [BUG FIXES]
 - Make the plugin compatible with Dancer2 v0.10.  (GH#i2, GH3, reported by
   sukria)

 [STATISTICS]
 - code churn: 9 files changed, 74 insertions(+), 27 deletions(-)