v1.5: update loggly cert for upcoming change

Merge pull request #22 from sendgridlabs/jrs_updatecert

update for upcoming cert change according to docs:

Upgrade base image and fix issue

Merge pull request #20 from sendgridlabs/jrs_issue19

 - update base alpine image from 3.2 -> 3.3

v1.3: Merge pull request #17 from ebr/tls

Use only TLS when sending to Loggly

v1.2

update README.md

v1.1: Merge pull request #12 from SOBAZAAR/multiple-tags

Add support for multiple tags.