Remove unnecessary requirement for device to be absolute#9

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p2rkw wants to merge 3 commits intothjaeger:masterfrom p2rkw:master

+8-7

Commits on Oct 1, 2016

fix build failed in libsignc++ version 2.5.1 or newer
nagae-memooff
committed

Commits on Feb 1, 2017

Remove requirement for current device to be in absolute mode, this will allow mtrack to be used with easystroke
p2rkw
committed
Increase required scores
p2rkw
committed