feat(change-log): Added new changelog

Added change log with grunt-conventional-changelog.

For Commit Guidelines, please refer to:
https://github.com/ajoslin/conventional-changelog/blob/master/CONVENTION
S.md
updated pt.json with better words
Fix #51 Alphabetical order on translated categories
Merge pull request #55 from LightDust/fix-51

Fix #51 Alphabetical order on translated categories
Revert "Fix #51 Alphabetical order on translated categories"

This reverts commit 0f757361b3ab59eab907712bb70c42a2bb021272.
Update CONTRIBUTING.md

Point to where we are discussing a new UI
Merge pull request #85 from brk00/patch-1

Update CONTRIBUTING.md
Merge pull request #4 from popcorn-official/master

sync