[lib] added .bl-reset() and .bl-reset-html5()
[examples] added reset example
[lib] .bl-size now will take 1 or 2 args
[examples] updated sample.less to include a .bl-size example
[lib] added spacing.less to provide helper mixins/classes for margin
[examples] added spacing example
[spacing] namespaced variables
[maint] moved info to component.json
Release 0.5.0