add AWScloudwatchEC2.rb to README, update AWScountEC2.rb
add AWScloudwatchEC2.rb to README, update AWScountEC2.rb

dlutzy/vacuumetrix,RiskMatch/vacuumetrix,vmetrix/vacuumetrix,tmonk42/vacuumetrix,akshatknsl/vacuumetrix,CrazyJvm/vacuumetrix