Adding release notes for 0.8.1

_posts/2018-07-02-Released-Cyclone-Scheme-0.8.1.md

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+---
+layout: post
+title: Released Cyclone Scheme 0.8.1
+excerpt: This release includes many performance enhancements and compiler optimizations.
+---
+
+Features
+
+- Improved garbage collector performance for large heaps.
+- Generate faster compiled code for:
+  - `car`, `cdr`, and most built-in predicates.
+  - Calls to `list` that contain less than five arguments.
+  - Calls to `map` and `for-each` that only pass a single list.
+- Allow optimization of some simple self-recursive functions.
+- Allow the optimizer to beta expand a wider range of function calls. 
+
+Bug Fixes
+
+- Fixed a bug where `current-jiffy` was returning total clock time of the process. Such an approach cannot be used to measure time accurately when more than one thread is executing concurrently.
+- Prevent the possibility of an infinite loop by not beta expanding recursive function calls.