use node['kernel']['machine'] instead of $arch, fixes https://github.com/edelight/chef-mongodb/issues/59
removed unavoidable warning
[scientific] add support via platform_family where possible
Added attribute bind_ip.

This enables configuration of mongodb's listening ip address. Default
is: node[:ipaddress] which doesn't change much and can be easily
overwritten within roles e.g. to localhost.
Making 'bind_ip' parameter optional.

Setting 'bind_ip' default value to nil, so we don't change MongoDB
defaults. Adding 'bind_ip' to metadata.
Typo error s/bin_ip/bind_ip/
parameterizing apt repo suffix, with default attr value
Fix checks for included recipes
adds name "mongodb" to metadata, very useful when working with Berkshelf
Merge branch 'master' of github.com:clicksign-infra/chef-mongodb