Merge pull request #554 from bpg/master

Implementation of #548 feature request
Fixed #548
Fixed for DBs that support DDL transactions (last commit broke it)
[maven-release-plugin] prepare release flyway-2.2
[maven-release-plugin] prepare for next development iteration
Fixed release build errors
[maven-release-plugin] prepare release flyway-2.2
[maven-release-plugin] prepare for next development iteration
Adjusted to Satisfy Sonatype OSS
[maven-release-plugin] prepare release flyway-2.2
[maven-release-plugin] prepare for next development iteration
Fixes #233 (was fixed as part of 2.2)
Fixes #555
Removed unused imports
performance improvment for MigrationVersion.compareTo

move logic of parsing to construction phase and make some reusing of
cached patterns
Suggest initOnMigrate for non-empty schemas
Merge pull request #564 from pwielgolaski/master

performance improvement for MigrationVersion.compareTo
Fixed #563
Fixed #559
Create LICENSE