Removed OS X specific aliases

Signed-off-by: Michael Welter <michael@cetoncorp.com>
Added ability to source OS specific rc file. OS X = .osx, Linux = .linux, Windows = .windows, etc

Signed-off-by: Michael Welter <michael@cetoncorp.com>
Added link to OS specific files under their corresponding sub folder

Signed-off-by: Michael Welter <michael@cetoncorp.com>
Added placeholder rc files for Linux, OS X and Windows

Signed-off-by: Michael Welter <michael@cetoncorp.com>