Add/career panel info (#375)

* Add career panel post to main page
* Add career panel event page
* Update _events/2021/2021-02-career-panel.md
* Update _posts/2021-02-05-career-panel.md
* Add engineering to Research Software
* Move expiration back a day
* Fix expiration date!

Co-authored-by: Vanessasaurus <814322+vsoch@users.noreply.github.com>

_events/2021/2021-02-career-panel.md

@@ -0,0 +1,12 @@
+---
+title: "ADSA/US-RSE Early Career Panel"
+expires: 2021-02-24
+event_date: "February 23, 2021"
+layout: event
+repeated: false
+---
+
+We've teamed up with [The Academic Data Science Alliance (ADSA)](https://academicdatascience.org/) to host an Early Career Panel on Research Software Engineering and Data Science careers in academia on February 23, 2021 at 2ET/11PT.  
+The event is primarily focused on students of all levels, postdocs, and those early in their careers, but all are welcome to attend.
+
+Registration is free! Please visit [https://academicdatascience.org/cdn/early-career-panel](https://academicdatascience.org/cdn/early-career-panel) for more information and a link to register.

_posts/2021-02-05-career-panel.md

@@ -0,0 +1,11 @@
+---
+layout: post
+title: RSE Early Career Panel Event
+tags: [events]
+posted_by: Ian Cosden
+---
+
+We've teamed up with [The Academic Data Science Alliance (ADSA)](https://academicdatascience.org/) to host an Early Career Panel on Research Software Engineering and Data Science careers in academia on February 23, 2021 at 2ET/11PT.  
+The event is primarily focused on students of all levels, postdocs, and those early in their careers, but all are welcome to attend.
+
+Registration is free! Please visit [https://academicdatascience.org/cdn/early-career-panel](https://academicdatascience.org/cdn/early-career-panel) for more information and a link to register.