* new fetch_calendar_data function
* new class Calendar
* Revert common/model.py to the state before the last commit
* dataframe transformation is making Timestamp objects in open and close columns naive before converting to dictionary.
* typing for function arguments added. Function returns list of Calendar objects that have properties defined like strings.
* else condition fixed
* else condition returns directly an empty without declaring a list name
* new backend API to get disk info from psutil
* Disk info div + disk space gauge div
* styling for git disk space gauge
* inital commit - jquery request to system-info endpoint
* div disk_info created
* get_system_info function is initiated once DOM is fully loaded.
* styling for disk-gauge-bar added
* get_system_info endpoint returns additionally an information about network, cpu_time and memory
* new <div> for graphical output of system info
* increased widht for disk-gauge-container
* if condition testing an index of response and rendering an output within div for graphical output
* div deleted
* RunManagerRecord class has a new attribute market. Market enum is imported.
* row_to_runmanager function considers market column
* add_run_manager_record and update_run_manager_record functions are changed. fetch_all_markets_in_run_manager is new.
* new Market enumeration class is defined
* market_value used for job scheduling. start and stop functions have modifications of market parameter input
* new is_market_day function + modifications of get_todays_market_times function
* market attribute set default to US
* row_to_runmanager function has no string formatter for market attribute
* add_run_manager_record function adn update_run_manager_record function update the DB column market based on record.market data
* start_runman_record and stop_runman_record have got no market parameter
* get_todays_market_times function is changed
* default value for market atribute is Market.US
* update_run_manager_record function has no if condition for market key
* market_value deleted, used enumaration value Market.US instead of string US
* get_todays_market_times has a new if condition for Market.CRYPTO
* update includes market column in the run_manager table
* market attribute in Run Manager record has value given by enumeration as Market.US
* documentation of changes made in the branch
* remove README_feature_market.md
* back to original state
* Delete README_feature_market.md
* _start_runman_record has an additional else condition
* is_market_day renamed to is_US_market_day
* transferables column added into runner_header table
