Convert xcode_command_line_tools to a custom resource for OS X 10.9+

[tas50]

Remove support for OS X 10.7-10.8 Eliminate the need for us to keep adding every new OS X update to the provider Simplify the code by deleting more than 1/2 the logic Convert the library LWRP to a custom resource using the DSL Add a test recipe do handle apt updates so we can remove apt from the testing deps

[jtimberman]

Every thumb I have says 👍

[atikhono]

@tas why has it been removed? We still need it!