Update default files to md and txt
Revert "Remove /opt/boxen/nodenv/shims:/Users/m.blair/.rbenv/bin:/opt/boxen/nodenv/shims:/Users/m.blair/.nodenv/shims:/Users/m.blair/bin:bin:/opt/boxen/homebrew/share/python:/opt/boxen/rbenv/shims:/opt/boxen/rbenv/bin:/opt/boxen/rbenv/plugins/ruby-build/bin:/opt/boxen/phantomenv/shims:/opt/boxen/phantomenv/bin:node_modules/.bin:/opt/boxen/nodenv/shims:/opt/boxen/nodenv/bin:/opt/boxen/goenv/shims:/opt/boxen/goenv/bin:/opt/boxen/bin:/opt/boxen/homebrew/bin:/opt/boxen/homebrew/sbin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin from sublime-build; causing problems on OSX"

This reverts commit 72216ea27f048e29640f4a0f1ea4c3bf7b4adb2b.