Bumps the package to 0.1.0 and adds a NEWS file.

Author: atheriel

DESCRIPTION

@@ -1,6 +1,6 @@
 Package: usdt
 Title: 'User-level Statically Defined Tracing' for R
-Version: 0.0.0.9000
+Version: 0.1.0
 Authors@R: c(
   person("Aaron", "Jacobs", role = c("aut", "cre", "cph"),
          email = "atheriel@gmail.com"),

NEWS.md

@@ -0,0 +1,7 @@
+# usdt 0.1.0
+
+* Initial public release. Includes an R6 interface for creating providers and
+  probes that can be traced by external tools such as BPF on Linux and Dtrace on
+  macOS, Solaris, and the BSDs.
+
+* Support for Linux via the bundled `libstapsdt`.