Add support for smallfiles flag

Conflicts:
	definitions/mongodb.rb
	templates/default/mongodb.conf.erb
fix tabs
updated apt dependency to allow more recent versions
Merge branch 'add_smallfiles_support' of git://github.com/Adallom/chef-mongodb into Adallom-add_smallfiles_support
updated the berks lock to reflect the new apt cookbook constraints
lock to stable berks >= 2
Merge pull request #130 from josephholsten/berks-2

lock to stable berks >= 2
Merge pull request #128 from buth/feature/apt_dependency

updated (very outdated) apt dependency to allow more recent versions