Many fixes and improvements.

• Add method to drop database. Removed static variable to staore al the database model to compare if it's already in use or not because we are using now only the db_name.
• Improvements in havascript info and warns
• Fixed mistake in varialbe from previous version. Fixed issue in javascript when update records. Improvements in the initializing of the database using less memory and faster code.
• Improved deserialization to include fields and caseinsensitive. Update nuget dependencies to last version.
• Add custom convertes to avoid possible issues with timespan, enum boolean and integer from string
• Update CustomJsonIimespanConverter to avoid return exceptions
• Change how to control propertytype in object json converter
• Fixed detect new table name from object properties
• Fixed default database name to get a context class name
• Fixed nulable datetime
• Fixed number with invarian culture because some browsers change number with culture specific