Update platform doc
Rewrite Add-on Credentials

Removed references to file name "creds.json"
Added section about SET_ENV_VARS
Review - update MemCachier addon doc
Fix platform doc
add gitignore
Update Memcachier java part
Add link to example application
Get packages index from S3 instead of Github
Change windows installer link
Fixed URL for New Relic's PHP-API Documentation
Quick review
Update Silex documentation