Update README, Add Issue Templates (#1685)

* Add canned issue templates

* Fix URL params

* Update the README

* Add CLA

* Update Youtube URL

* Remove sudo from example readme

* Reword dependencies in main readme

* Replace mkvirtualenv with default version

.github/ISSUE_TEMPLATE.md → .github/ISSUE_TEMPLATE/bug_report.md

@@ -1,20 +1,27 @@
-### OS / Environment
-<!--- lsb_release -a --->
+---
+name: Bug report
+about: Create a report to help us improve Manticore
+title: ''
+labels: bug
+assignees: ''
+
+---
+
+### Summary of the problem
+
 
 ### Manticore version
 <!--- pip show manticore | grep Version --->
 
 ### Python version
 <!--- python --version --->
 
+### OS / Environment
+<!--- lsb_release -a --->
 
 ### Dependencies
 <!--- pip freeze --->
 
-
-### Summary of the problem
-
-
 ### Step to reproduce the behavior
 
 
@@ -27,4 +34,3 @@
 ### Any relevant logs
 
 
-

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,14 @@
+blank_issues_enabled: false
+contact_links:
+  - name: Bug Report
+    url: https://github.com/trailofbits/manticore/issues/new?labels=bug&template=bug_report.md
+    about: Report a bug in Manticore
+  - name: Feature Request
+    url: https://github.com/trailofbits/manticore/issues/new?labels=idea&template=feature_request.md
+    about: Request a new feature in Manticore
+  - name: Ask a Question
+    url: https://github.com/trailofbits/manticore/discussions/new
+    about: Ask for help or clarification from the developers
+  - name: Join our Slack
+    url: https://empirehacking.slack.com/archives/C3PTWK7UM
+    about: Engage with other users of Manticore

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,20 @@
+---
+name: Feature request
+about: Suggest a new feature for Manticore
+title: ''
+labels: idea
+assignees: ''
+
+---
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.

CONTRIBUTING.md

@@ -18,10 +18,14 @@ instead.
 
 ## Questions
 
-Questions can be submitted to the issue tracker, but you may get a faster
+Questions can be submitted to the [discussion page](https://github.com/trailofbits/manticore/discussions), but you may get a faster
 response if you ask in our [chat room](https://empireslacking.herokuapp.com/)
 (in the #manticore channel).
 
+## Legal
+For legal reasons, we require contributors to sign our [Contributor License Agreement](https://cla-assistant.io/trailofbits/manticore).
+This will be automatically checked as part of our CI. 
+
 ## Code
 
 Manticore uses the pull request contribution model. Please make an account on