Update page 'Settings'

Settings.md

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+![Settings Image](https://raw.githubusercontent.com/CS-4820-Library-Project/Libly/master/images/SettingsHelp.PNG)
+
+## General
+
+**Show Debug Messages in Console Window:** Shows the verbose debug messages in the console window of the program. Useful for finding errors.
+
+## Reports
+
+**Yearly reports directory:** Location of where to save yearly reports, reports with 12 or less months
+
+**Other reports directory:** Default save location for non yearly reports, reports with more than 12 months. Reports saved here will not be incorporated into the database.
+
+**Report request interval:** The amount of time to wait between requesting reports from a vendor. Some vendors require us to wait before making another request. 
+
+**Request timeout:** Amount of time to wait before cancelling a request for reports.
+
+**Concurrent Vendors:** The maximum number of vendors to work on at the same time, can impact PC performance.
+
+**Concurrent Reports:** The maximum number of reports to work on at the same time, can impact PC performance. 
+
+**Empty Cell:** Empty cells retrieved in reports will be replaced by whatever text is entered here. 
+
+## Costs
+
+**Default currency:** The currency shown first in the options in the Costs tab. This does not have to be one of the currencies in the default list.
+
+## Search
+
+**Rebuild Database:** Rebuilds the database from scratch based on the files in the "./all_data/.DO_NOT_MODIFY/" (hidden) directory. Also rebuild the costs in the database from the files in "./all_data/costs/" directory. Here "." is the directory the program is installed in.