Made the mood meter spin

Just like in the good ol days
Tidied up the css that I added
Fixed the css I added
Merge pull request #62 from ChildrenOfUr/dev

Dev
fixes #60
Merge branch 'chat' into dev
fixes #48
Merge branch 'chat' into dev
Merge branch 'dev'
fix problem where username is sometimes null
Added new logo, favicon, link to homepage
fixes #63
More links in footer + new alignment
added a space
Merge pull request #73 from ChildrenOfUr/pr/72

Pr/72
Update chat_bubble.dart
Merge pull request #75 from Klikini/patch-2

Update chat_bubble.dart to allow variable time for bubble to exist depending on length of message (up to a maximum of 15s)
fixes

fixed typos,
changed link to the new site,
added link to dart homepage
Merge pull request #76 from Klikini/patch-3

fixes for README.md
fixes #69