Fix min_range option to stop numberofcpucores.php returning 0

The minimum options for filter_var() with FILTER_VALIDATE_INT should me
min_range.
Fixes #148
Merge pull request #166 from inflammable/master

Fix min_range option to stop /sh/numberofcpucores.php returning 0
Merge branch 'master' of https://github.com/afaqurk/linux-dash