Bump version to 0.12.0

Release 0.12.0.rc5

Release 0.12.0-rc4

Add script for automating gem release

Release 0.11.0

Bump version (0.10.0)

Fix options bug; add ability to skip missing migrate sources (#60)

Fix options bug; add ability to skip missing migrate sources

The `options:` setting for `migrate` actions was reading an erroneous truthiness to test for the existence of a setting. Fixed this so opt settings other than `inclusive: false` actually work.

Added the ability to set an option `missing:` with either `warn`, `skip`, or `exit` as values.
If `missing: warn`, the operation skips the migrate step and logs a warning to console.
If `missing: exit` (the default, w/ backward compatibility) the operation throws an error and exits.

Added example and explanation for new `missing:` setting to README.

* Remove erroneous require (from testing)

* Rearrange missing handling; add 'skip' option

* Bump version to 0.9.5

Bump version 0.9.4

Patch 0.9.3 (#53)

* Properly trigger dynamic config build
   Based on:
   * explicit --parse-config flag
   * passing of any --var during a config build
   * existence of Liquid tags in config file

* Add Liquid detection proc; returns true if Liquid tags found

* Stop passing Jekyll config params over CLI
  Pass config-based Jekyll arguments to jekyll as a Jekyll config file instead of over CLI

* Version bump

Sets empty global 'variables' param only when nonexistent (#52)