Feat/mark i like functions as predicates #1310

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10 warnings

in order to compile .yrl files, you must add "compilers: [:yecc] ++ Mix.compilers()" to the "def project" section of your mix.exs

in order to compile .xrl files, you must add "compilers: [:leex] ++ Mix.compilers()" to the "def project" section of your mix.exs

negative steps are not supported in Enum.slice/2, pass 71..-1//1 instead

negative steps are not supported in String.slice/2, pass 54..-1//1 instead

negative steps are not supported in Enum.slice/2, pass 183..-1//1 instead

negative steps are not supported in String.slice/2, pass 86..-1//1 instead

negative steps are not supported in String.slice/2, pass 82..-1//1 instead

negative steps are not supported in Enum.slice/2, pass 125..-1//1 instead

negative steps are not supported in Enum.slice/2, pass 86..-1//1 instead

negative steps are not supported in String.slice/2, pass 61..-1//1 instead