Merge pull request #152 from nanan9177/blockly_fix

Chinese i18n title update.
fix read pool adapters
Phase 1 of implementing prizes
PR feedback, add auth, insert conditional earned prize message on trophy block
Merge pull request #153 from code-dot-org/start_prizes

Phase 1 of implementing prizes - includes PR feedback delivering verbally
move log to a function, validate possible nil params
PrizeMailer added and hooked up with basic templates
Don't show teachers their student's email address
Ignore format types in puzzle requests (img, json, etc)
Added the new Artist 4 stage.
Merge pull request #154 from nanan9177/tutorial

Added the new Artist 4 stage.
Moving Stage 3 (Artist 4) to EC script for checking. Will bring it back once we have tested.
Merge pull request #155 from nanan9177/tutorial

Moving Stage 3 (Artist 4) to EC script for checking. Will bring it back ...
increase dev connection limit
create prize_providers and dummy prizes
prizes: phase 2 - view earned prizes and eligible prize providers on new /redeemprizes page
Merge branch 'master' of github.com:code-dot-org/dashboard
Translations
Try different GA tag to fix tracking issue
Fix read_pool syntax error (_ vs -)