refactoring add_hashtags
add read functions
some new tweet query functions
fix add_hashtags parameters
setter for api property
get api instance from plugin
get API instance from plugin
do not use camel case method names
do not use camel case method names
do not use camel case method names
do not use camel case method names
add tweet object
use tweet object insert method for save
we do not need $api porperty anymore in importer
methods for handling last_check field
require twitter api class when it needs
implementing API request to check tweet existence
read tweets for display