merge nathanlws: Fix deb init script redirect

Merge pull request #1029 from nathanlws/sql-layer/fix-deb-redirect
https://github.com/FoundationDB/sql-layer/pull/1029
Include indexed table for full text index affected IDs
Allow exclusion of duplicate tables and groups
New error code and exception
Online DDL metadata flow, working createIndexes path
Some alter API cleanup
Working ALTER flow
ChangeSet protobuf and helper
Record ChangeSets with online ddl. Build for createIndexes.