add readme entry for additional adapters
clean up bash formatting of folders
clean up spacing of adapters markdown
odd bash spacing chars
add ruby license and specify in gemspec.
Fix let to not memoize values across different examples in the same example group.
Fix https://github.com/zdennis/activerecord-import/issues/123 - Ensure changed? returns false after synchronizing models
Only add columns that haven't already been added
Merge pull request #130 from jwg2s/feature/fix-duplicate-columns

Only add columns that haven't already been added
Do not fail miserably if an adapter is not specifically supported. 

Instead, rely on basic behavior which supports non-optimized imports.

[#131]
Merge branch 'chores/fallback-to-slow-import-for-unknown-adapter'
Merge pull request #125 from salsify/issues/123

Fix issue #123
Merge pull request #121 from abrandoned/master

documentation for additional adapters
Merge pull request #124 from mokhan/add-license-to-gemspec

add ruby license and specify in gemspec.
Add jdbcpostgresql support.
Merge pull request #132 from huned/feature-jdbc-postgresql-adapter

add jdbcpostgresql support
Version bump to 0.5.0
Fix "ruby-debug" listed more than once "warning"
Merge pull request #134 from jzaleski/jwz-fix-warning-for-ruby-debug-gem

Fix "ruby-debug" listed more than once "warning"
document all_or_none option