Added description support for migrations

Signed-off-by: Michał Zalewski <michal@mzalewski.net>
Merged with upstream/master
Added IVersionMetaDataEx(tended) closes  #295
Choose the least breaking way of implementing this feature
Renamed IVersionTableMetaDataEx to IVersionTableMetaDataExtended, just to reveal intend better
set CLS compliance to true
Corrected parameter name from "primaryTableName" to "foreignTableName"
Merge pull request #448 from starpeng/master

fixed SqlServer2000Processor sql template error
Merge pull request #449 from geirsag/master

Corrected parameter name from "primaryTableName" to "foreignTableName"
Merge pull request #447 from lahma/set-ClsCompliant-true

set CLS compliance to true in nant script
Adds CLSCompliant attribute to the assembly info

A change to the rake script to make the assemblies
CLS compliant.
Partially reverted ForwardOnlyMigration closes #436
Merge branch 'master' of https://github.com/drucik86/fluentmigrator into drucik86-master
Fix issue with versionloader and fix tests
Merge pull request #401 of drucik86/master

# By Michał Zalewski (1) and Tom Marien (1)
# Via Tom Marien (2) and Michał Zalewski (1)
* drucik86-master:
  Fix issue with versionloader and fix tests
  Added description support for migrations
VersionLoader gets version column by name closes #456
Merge branch 'Issue295' of https://github.com/tommarien/fluentmigrator into tommarien-Issue295

Conflicts:
	src/FluentMigrator.Runner/VersionLoader.cs
	src/FluentMigrator.Tests/Unit/TestVersionTableMetaData.cs
	src/FluentMigrator/VersionTableInfo/DefaultVersionTableMetaData.cs
Merge pull Request #427 of tommarien/Issue295

* tommarien-Issue295:
  Renamed IVersionTableMetaDataEx to IVersionTableMetaDataExtended, just to reveal intend better
  Added IVersionMetaDataEx(tended) closes  #295 Choose the least breaking way of implementing this feature
Bumped version to prepare for release
Fallback to Migration Type name if Description is not supplied closes #458
Fixed description column to string(1024) as int.MaxValue was not supported yet for every processor