Merge pull request #13 from stuart-warren/next

Next
pre tag v0.1.0
pre-emptively changing version number to 0.2.0-SNAPSHOT
Can now add custom fields and tags

Fixes #1... finally!
Now able to add custom tags and fields to all logs in config file.
Comma separated list of tags
Comma separated list of key:value pairs for fields.

Very little testing but seems to work.