Remove signal/noise ratio for 3m and egalax devices
Move *.ev files in 3.6.x

Just to be able to track different kernel releases
Add sane dumps from 3.7 kernel series

3.7 introduced some changes in those particular devices, we can add them
to the database.
Add sane dumps from 3.8 kernel series

Kernel 3.8 introduced several changes:
- change the way of computing the max contact count (this explains
why so many files are updated)
- win 8 certified devices have extra axes.