Conflict Data Additions

[ajnafa]

Let me start by saying this is an awesome package that has been extremely useful for constructing duration data. Over the past decade peace science (comparative politics/civil conflict) has moved in a subnational direction (there's only so much we can learn from the country-year) and I'm wondering how much work it would be to add support for the major event-level data projects? Namely, UCDP's Georeferenced Event Dataset (GED) Global version 21.1 and the Armed Conflict Location & Event Data Project. Of course, due to size limitations it may not be feasible to include them by default but this could be handled via some basic functions that when called download and import the data. In the case of ACLED there may be some licensing issues that complicate things. The most straightforward solution I can think of in that case would be to utilize their recently added API and have users specify their own key but it may be necessary to seek guidance from ACLED regarding how best to handle that since you have to have an API key to even download their curated data files now. I may have some time to work on some of the API stuff next month if you're interested in adding that functionality.