Version 3.2.7

#1210 : AddFluentMigratorCore() - Only register default IConventionSet if none registered yet. (@tgharold) Fixes #1194. (@rodrigoramos)
#1257 : Display preview-only mode header when running migrate:down (@sowings13)
#1253 : Do not use Console.WriteLine. (@pergardebrink) Fixes #1252 (@YeskaNova)
#1243 : Add description to sql statement expression. (@pergardebrink) Addresses feature request #1242 How to remove sensitive information (ex: passwords) from the output (@andrecarlucci)
#1130 : Add unmapped subcommands for FluentMgirator.DotNet.Cli. Fixes #1123 dotnet fm rollback all does not work . Documentation was also updated in fluentmigrator/documentation#19 @gandarez
#1196 : Fix large string literals oracle @PhenX
#1187 : Adds tests to reproduce the infinite loop issue in #970 (@PeterKneale)
#1081 : Support for MSSQL index filters and data compression (@gliljas)