Remove Mixfile from the main project, replace with example Elixir pro…

…ject (#22)

A dual-language build doesn't seem to be working for me, so this
uses only Erlang for the library and creates an example Elixir
project to verify that functionality.

fix type of version string in mix.exs (#21)

fix missing mix.exs in release (#20)

* skip installing elixir on a publish-build

* include mix.exs file

Various version-related updates (#19)

* Update worker_pool deps

* update worker_pool in rebar.config

* use a function to set the version number in the mixfile

* add a little Hex badge

* some documentation-related work in progress

* remove some doc work that's too soon

* don't explicitly mention a version number

* fixup

* fixup: fallback to unsorted tags

* Elixir to 1.3

* allow mix to install rebar3

Provide friendly Elixir interface (#15)

* Provide friendly Elixir interface

* specify otp_release so travis won't get confused

* specify elixir version, improve conditionals in build scripts

* look at ELIXIR_VSN

* more elixir attempts

* more elixir attempts

* Revert "more elixir attempts"

This reverts commit a010567.

* try elixir 1.2.0

* what elixir is available?

* kiex use

* source kiex script

* use a custom kiex with github header

set a proper app description

fix deploy script bug

set deploy script exec

more travis

YAML woes