- add basic rollup config to bundle minified and browser compatible js
- use babel to transpile
typescript files to js
- add static code checkers: eslint and stylelint
- update package.json
scripts
- update DEPENDENCIES.md file to include rollup and popper
- set html in rss feed
description fields
- update Podcast and Episode entities to add description_html attribute
generated by parsing markdown to html using parsedown

#9

- refactor model / entity and controller logic for DRY code
- update episodes and podcasts
migrations
- define callbacks for podcast and episode models for enclosure update and cache
clearing

- refactor episode, podcast and category entities to add dynamic properties
- refactor Routes when adding feed route
- update migration files to better fit itunes' and rss' specs
- update podcast and episode forms
- add SimpleRSSElement class to Libraries
- add rss_helper
- update home controller to redirect if system has only one podcast