Merge pull request #1 from kunalpowar/master

-Removed low resolution mode from bh1750fvi package
lowercase package name
add the message about the bh1750fvi support
added water sensor library
added water sensor sample
Water sensor Packaged
Merge branch 'master' of https://github.com/kid0m4n/go-rpi
Added package for 4x3 keypad interface
Updated Readme to include link for 4x3keypad
delete watersensor binary
support for bmp180