Added Auto Indexing & Indexing Mode parameters in Add-DocumentCollection Cmdlet

Couple of weeks back I released Powershell cmdlets for DocumentDB in Github (Further info on this can be found in my blog here). Today I merged & added  Automatic Indexing & IndexingMode parameters to the Add-DocumentCollection Cmdlet to the project in the module. https://github.com/savjani/Azure-DocumentDB-Powershell-Cmdlets Azure DocumentDB collections are auto-indexed by default allowing the developers  to…