Bump the version to 1.0.0 and add a NEWS file.

Author: atheriel

DESCRIPTION

@@ -1,6 +1,6 @@
 Package: httpproblems
 Title: Report Errors in Web Applications with 'Problem Details' (RFC 7807)
-Version: 0.0.0.9000
+Version: 1.0.0
 Authors@R: 
     c(person(given = "Aaron", family = "Jacobs", role = c("aut", "cre"),
              email = "[email protected]"))

NEWS.md

@@ -0,0 +1,11 @@
+# httpproblems 1.0.0
+
+* Initial release. **httpproblems** provides tools for emitting the "Problem Details" structure defined in
+  [RFC 7807](https://tools.ietf.org/html/rfc7807). It is intended to help R users report errors from
+  HTTP APIs in a consistent, standard way.
+  
+* Provides `http_problem()` for creating the Problem Details structure, plus several helper functions for HTTP 400 Bad Request, 404 Not Found, 401 Unauthorized, 403 Forbidden, 409 Conflict, and 500 Internal Server Error.
+
+* Provides `stop_for_*()` variants that signal a custom condition for these problems.
+
+* Provides `http_problem_types()` for listing built-in type and title entries.