Avoid crashing on new lines in /etc/fstab

Also handle /dev/shm mounts, which are not shown in the output of /etc/mounts. (/etc/mtab, however, records the /dev/shm mounts)
basic check

Checks for 200 ok.
Fixed rubocop failiures from whitespace
Attempting to update the es checks to have some standardization
Setting defaults to integer and adding missing proc
aws credentials is not required as option
made file executable
Merge pull request #652 from willejs/patch-3

basic etcd check
Merge pull request #683 from y13i/elb-full-metrics-iam-role

aws credentials is not required as option
Merge pull request #682 from jaxxstorm/escheckupdates

Attempting to update the es checks to have some standardization
check-fstab-mounts.rb reads from /etc/mtab now
Merge pull request #613 from greezybacon/patch-1

Avoid crashing on new lines in /etc/fstab