Include a sample for parsing Rails logs
Normalized indentations from 0 or 2 spaces to 4 spaces.

Also bye to trailing newlines.
Fixed indentations to 4 spaces
Added fieldreferences to grab nested items inside messages.
Added fieldreferences to grab nested items inside messages.

Added thanks, description in readme.
Updated readme.txt

Fix filename
Merge pull request #6 from shurane/ref_nested_fields

Fieldreferences example for nested JSON fields.
Merge pull request #7 from shurane/indentation_four_spaces

Normalized indentation to 4 spaces.
Merge pull request #9 from torrancew/rails_logs

Include a sample for parsing Rails logs
Merge pull request #10 from yogi183/patch-1

Updated readme.txt
Added a way to delete nested fields.
Empty out "more" field, but completely delete the "bytes" field.
Added a non-Ruby filter to delete nested fields.

Referenced by Jordan Sissel in:

    https://groups.google.com/d/msg/logstash-users/QWbd6loM9DY/McnqWcchO1gJ
Updated Ruby filter readme. There is a way to delete a field inside
Logstash.