Qteasy

- Added dbutil as mandatory dependency, and moved pymysql also as mandatory, removed optional dependencies as database
- Fixed a bug: warnings showing missing of some dependencies are not properly displayed.

What's Changed
* Update qteasy v1.4 documents by shepherdpp in https://github.com/shepherdpp/qteasy/pull/196
* update to version 1.4.2 by shepherdpp in https://github.com/shepherdpp/qteasy/pull/198
* Update qteasy v1.4 documentations by shepherdpp in https://github.com/shepherdpp/qteasy/pull/197


**Full Changelog**: https://github.com/shepherdpp/qteasy/compare/1.4.1...1.4.2

Fixed bugs:
- sometimes the back-adjusted prices are not properly get from data source
- sometimes data types with parameters will not set correct parameter into the kwargs, and will cause problem
- sometimes the realtime kline data will have no valid trade time in index
Improvement:
- Improved function refill_data_source, made parameters "channel" and "data_source" optional and provided type and validity check

What's Changed
* Upgrade to version 1.4.1 by shepherdpp in https://github.com/shepherdpp/qteasy/pull/195


**Full Changelog**: https://github.com/shepherdpp/qteasy/compare/1.4.0...1.4.1

New features:
- A new DataType class has been introduced, making it much easier and more flexible to utilize historical data stored in local datasources
- Now datatypes can be defined with parameters followed by a "|" in its name, like "close|b" represents "back adjusted close price".
- A new data_channel module has been defined for qteasy, allowing users to download data from different online sources
- More data tables are defined to store more types of financial historical data.
- Enhanced real-time price data acquisition APIs, allowing real-time data been downloaded from different sources
- More introduction to above new features can be found in qteasy documents.
Deprecated
- The old way of extracting adjusted price data with parameter "adj" is deprecated, although still supported, now adjusted prices can be acquired with datatypes with parameter like "close|b" or "open|f"
- The old way of getting composition data, "wt_000300.SH" is deprecated and replaced by datatype with parameter: "wt_idx|%" where % is any index code
- More introductions to the new datatypes can be found in qteasy documents.

What's Changed
* Improvement on Historical Data Management by shepherdpp in https://github.com/shepherdpp/qteasy/pull/186


**Full Changelog**: https://github.com/shepherdpp/qteasy/compare/1.3.12...1.4.0

- Improved Log information and print outs in trader TUI and CLI:
- excessive digits of amount changes are now truncated to 2 or 3 digits in trader CLI for RESULT DELIVERY
- added timestamp before all system logs on the system log pane
- added system environment information in TUI system info panel

What's Changed
* Minor improvement to version 1.3.12 by shepherdpp in https://github.com/shepherdpp/qteasy/pull/191


**Full Changelog**: https://github.com/shepherdpp/qteasy/compare/1.3.11...1.3.12

A quick bug fix: Now pure digit strings are correctly parsed in the start-up configuration file

- removed deprecated pandas syntax from database.py and updated version requirements
- added qt level configure keys for Chinese font names in candle chart for different Operating systems respectively:
- `ZH_font_name_MAC` / `ZH_font_name_WIN` / `ZH_font_name_LINUX`
- added qt function and attributes:
- `get_start_up_settings()` / `start_up_config`
- corrected help messages for live trader users

What's Changed
* corrected mistakes by shepherdpp in https://github.com/shepherdpp/qteasy/pull/185


**Full Changelog**: https://github.com/shepherdpp/qteasy/compare/1.3.9...1.3.10