Add NOTICE.txt to comply with ASLv2 instructions
Add NOTICE.txt to comply with ASLv2 instructions

According to the Apache website for ASLv2:

  http://www.apache.org/dev/apply-license.html#new

Which states "In addition, a correct NOTICE file MUST be included in the same
directory as the LICENSE file.". This patch adds such a file.

Signed-off-by: Ken Barber <470bc578162732ac7f9d387d34c4af4ca6e1b6f7@bob.sh>

grimradical/puppetdb,johnduarte/puppetdb,waynr/puppetdb,kbarber/puppetdb,ajroetker/puppetdb,ajroetker/puppetdb,mullr/puppetdb,waynr/puppetdb,senior/puppetdb,shrug/puppetdb,mullr/puppetdb,kbarber/puppetdb,mullr/puppetdb,johnduarte/puppetdb,senior/puppetdb,puppetlabs/puppetdb,grimradical/puppetdb,cprice404/puppetdb,cprice404/puppetdb,highb/puppetdb,grimradical/puppetdb,ajroetker/puppetdb,cprice404/puppetdb,senior/puppetdb,shrug/puppetdb,shrug/puppetdb,rbrw/puppetdb,kbarber/puppetdb,kbrezina/puppetdb,jantman/puppetdb,waynr/puppetdb,kbrezina/puppetdb,senior/puppetdb,highb/puppetdb,grimradical/puppetdb,jantman/puppetdb,mullr/puppetdb,shrug/puppetdb,ajroetker/puppetdb,puppetlabs/puppetdb,wkalt/puppetdb,wkalt/puppetdb,kbrezina/puppetdb,puppetlabs/puppetdb,johnduarte/puppetdb,puppetlabs/puppetdb,highb/puppetdb,highb/puppetdb,waynr/puppetdb,kbrezina/puppetdb,mullr/puppetdb,rbrw/puppetdb,jantman/puppetdb,kbarber/puppetdb,rbrw/puppetdb,wkalt/puppetdb,wkalt/puppetdb,johnduarte/puppetdb,puppetlabs/puppetdb,rbrw/puppetdb,rbrw/puppetdb