Changes

2.3.0

Allow nil values, empty fields, and deduplication

This adds three new settings (all of whose defaults reflect current behavior)
- allow_nil_values (default: false). Allow nil values to be sent on to the writer
- allow_duplicate_values (default: true). Allow duplicate values. Set to false to force only unique values.
- allow_empty_fields (default: false). Default behavior is that the output hash doesn't even contain keys for a to_field which doesn't produce any values. Set to true to pass empty fields on to the writer (with the value being an empty array)

2.2.1

Had inadverntantly broken use of arrays as extract_marc specifications. Fixed.

2.2.0

Change DebugWriter to be more forgiving (and informative) about missing record-id fields
Automatically require DebugWriter for easier use on the command line
Refactor MarcExtractor to be easier to read
Fix .travis file to actually work, and target more recent rubies.

2.1.0

update some docs (typos)
Make the indexer's writer r/w so it can be set at runtime (#110)
Allow extract_marc to be callable from anywhere (#111)
Add doc instructions/examples for programmatic Indexer use
Much better error reporting; easier to find which record went wrong

2.0.2

Guard against assumption of MARC data when indexing using SolrJsonWriter (#94)
For MARC Records, try to use the production date when available (#93)

2.0.1

Fix bad constant in logging (#91)

2.0.0

Compatible with MRI/RBX
Default to SolrJsonWriter
Release separate MRI/JRuby gems

1.0

First release