Fix for INSERT on Android version - working with both #120 (INSERT or IGNORE) and constraint violation error reporting
Added vim files to gitignore
Move plugin-specific tests of db.executeSql() & sqlitePlugin.deleteDatabase() to the end
Add tests to reproduce bugs #109/#110/#111/#112 & verify fixes (missing openDatabase()/db.close()/deleteDatabase() callbacks; double db.executeSql() callbacks; deleteDatabase() not reliable); small changes to deleteAndConfirmDeleted() helper function for existing test of sqlitePlugin.deleteDatabase()