Merge branch 'refactor' into develop

Adds ttf to eot conversation using the ttf2eot gem

Updates the README: ttfautohint is not an issue anymore, but ttf2eot is

Documents the custom templates feature

Adds basic documentation in README

Adds support for additional (custom) templates

Requires 'blacksmith/executable' in lib/blacksmith.rb

Extracts Blacksmith::Executable out of Blacksmith::FontForge again

Adjusts Blacksmith::DSL to really use the Blacksmith::Font interface

Fixes minor issues in templates

Drops JRuby from .travis.yml for now

Uses #send instead of #public_send for Ruby 1.8 compatibility

Refactors Blacksmith::FontForge to work fine with the templates generated by Thor

Explicitly casts stream into String in capture helper

Removes whitespace