Handle the situation for changing index annotation on fields or add new columns with index annotation.

Now we can know if a column has index or not with DBUtility.findPragmaTableInfo method. Show this function in the demo.

Add SaveAllKotlinTest for kotlin style saveAll API.
Correct some comments.

Marked async db operations as deprecated. Developers should handle async operations in their own way.

LitePal doesn't support byte field for binary data anymore. Save the binary file path into db instead.

Marked async db operations as deprecated. Developers should handle async operations in their own way.

Add more test cases for it.

Add throwable message for some non-reproduce crash like: https://github.com/LitePalFramework/LitePal/issues/561

Maybe very helpful to locate crash reason.

Solve the getDatabase called recursively problem when operating database in the DatabaseListener callback. issue https://github.com/LitePalFramework/LitePal/issues/528