Note: To understand users/server owners better and see what to focus on next for the plugin please fill out this survey https://bit.ly/mcharrypotterspells

Most of this update was dedicated to making the extensions system that will host Official extensions as well as community-created extensions.
These extensions will sit under the HarryPotterSpells > Extension folder.
Documentation for developers will come out after finalization of the API.

For users and server owners, this gives us the ability to add in multiple extensions to HarryPotterSpells in the future such as SpellSigns, SpellBooks, Sorting Hats, Extensions that help the plugin adhere to Factions, WorldGuard.

First official extension will be SpellSigns, currently scheduled to come out with the next plugin release.

Change log
Issues:
- Fix spell.yml config issue for Arrow, Stupefy. Previously non-decimal number caused the spells to not work
- Remove apache commons 3, using 2.6 instead as Spigot no longer shaded the jar and exceptions were appearing everywhere

Spells:
- Add Carpets to Multicorfors

Plugin:
- Add /hps reload GeneralCommand, reloads config files, recipes and extensions without restarting the server.
- Add utf-8 support to language properties files
- Add zh-chinese.properties. Thanks to @Eifime
- Update travis.yml to build on trusty

Extension Manager Updates in preperation for next update:
- Add FileExtensionFilter and ExtensionException
- Add in seperate configuration for Extensions
- Add ExtensionLoader to handle proper classloading of extensions
- Add methods getConfig, saveConfig, reloadConfig to aid configuration functionality
- Replaced static method Extension.create with a default method init()
that would be called upon being loaded by ExtensionLoader due to
Extension.create being able to be accessed from anywhere
- Update HPS to reflect extension changes