Add support for alternate S3.

Major update for latest go version, update all deps, rev to 0.3.0.

0.2.3

• Add support for Google Cloud Storage
• Updated google cloud import
• Changed health check to not use connection pool

0.2.2

• Add hostname to backup file
• Add optional prefix configured via env var
• Add optional SSE for S3 backups

0.2.1

• Bug fix for restore path

0.2.0

• Clean up acceptance test logics by moving to config struct
• Back up ACLs
• Back up Prepared Queries
• Optionally encrypt data with a CRYPTO_PASSWORD environment variable passphrase
• Add metadata on backups
• Refactor backup layout and adjust restores
• Add additional unit and acceptance tests
• Add a default backup interval of 60 seconds

0.2.0 retains backward compatibility with restorations of older versions of backups

0.1.6

• Fix regression in temp file restore location [Issue#4]

• Minor update to remove AWS credentials as required

0.1.3

• Add configurable tmp dir

0.1.2

• Fix regression in remote file naming