Snlquest

This patch provides a number of content and quality of life updates for QuESt Data Manager and QuESt Valuation.

QuESt
QuESt Data Manager
* Market and operations data for ISO-NE, NYISO, CAISO, and SPP market areas are now available.
* Added buttons that cancel the current data download requests.
* The download/cancel buttons are independent for each tab.

QuESt Valuation
* (Arbitrage) and regulation market models for ISO-NE, NYISO, CAISO, and SPP are now available for use in all QuESt Valuation modes.

Resolved issues
* An issue where QuESt Valuation would say that you have no data downloaded even if you do and prevent you from proceeding.
* An issue where certain choices in QuESt Valuation wizard would cause the application to force quit upon attempting to solve.
* An issue where data scanning at QuESt Valuation startup would take an inconvenient amount of time to complete.
* An issue where newer versions of `matplotlib` (3.x) were incompatible, resulting in application crash at launch.
* An issue where background threads would persist until completion even when QuESt was closed.

Known issues
* An issue where older versions of `pandas` were incompatible, resulting in application crash during certain operations. A package version number has now been specified in the setup file. Please either rerun the `setup.py install` or manually update your `pandas` package.
* An issue where certain pricing node options in the SPP market area will not have LMP data for certain time periods, despite having the option to select it in QuESt Valuation menus. This is due to having a static list of pricing nodes for SPP. Previously, this would cause a full application crash if none of the selected months for valuation were solvable.

The official release version of QuESt.

QuESt
QuESt Data Manager
An application for downloading data from RTO/ISO/market operators for use in other QuESt applications.

* Market and operations data for the following RTOs/ISOs are available using the download utility:
* ERCOT
* MISO
* PJM

QuESt Valuation
An application for performing energy storage valuation. Using historical data from market area operators, set up and solve optimization problems to estimate an upper bound on the revenue that a energy storage device could have generated over the horizon of the data.

* Features
* Wizard: a streamlined, guided interface for setting up sets of valuation runs
* Pick a market area, pricing node, energy storage device, and historical dataset
* Perform a valuation for the device each month in the set
* Generate a pro forma report to summarize the findings in a convenient document
* Single Run: a more flexible interface for setting up valuation runs for one month at a time
* Offers more customization in terms of energy storage device and simulation parameters than the wizard
* Batch Runs: an even more flexible interface for setting up large sets of valuation runs
* Expands upon the wizard, allowing for the selection of multiple months for valuation
* Perform parameter sweeps to look at the sensitivity of certain device or market parameters
* Results viewer: a convenient tool for quickly checking your valuation results
* Plot time series of revenue, state of charge, or scheduled charging/discharging actions
* View the statistics of electricity prices for each month
* Export .csv files for external viewing or processing

Known issues
* An issue where the solver does not exit successfully for certain optimization problems.
* An issue where certain downloaded data may not appear as options for use in QuESt Valuation.
* An issue where results for MISO valuations have constant objective functions leading to trivial optimization problems are obtained when they should be excluded.