add readme entry for additional adapters
clean up bash formatting of folders
clean up spacing of adapters markdown
odd bash spacing chars
Do not set created_at/on timestamp for existing records
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"