CRAN submission update from 0.2.0.2

2# shiny.reglog 0.3.0

Added credentials argument to create_sqlite_db to create SQLite database containing some data
Removed use_language from exported functions, as its functionality is minimal out of its usage context
sqlite_get_db and gsheet_get_db functions are now exported, as their functionality grew with added credentials argument
Fixed user_id value returned by login_server function for anonymous users. It is now in form of paste("Anon", Sys.time(), sep = "_") to force its reads as character object. Before it could be read as datetime object while reading from 'googlesheets' database and it caused some bugs

3# shiny.reglog 0.4.0

Added credentials argument to create_gsheet_db, mirroring the same functionality of create_sqlite_db
Added logout_button function, providing the users a way to log out during usage of ShinyApp
Added description of how to provide credentials to create_sqlite_db and create_gsheet_db functions
Created vignette specifying the authorization process for gmailr and googlesheets4 to use their methods of email sending and database storage
Removed dbplyr dependency

0.4.1 - minor CRAN tweaks

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