Removing Markdown syntax from CHANGELOG

Doing it for consistency, but not sure this actually
improves the readability.

CHANGELOG

@@ -14,31 +14,31 @@
     * Writing files using WAVEFORMATEXTENSIBLE format is not supported - all
       files will be written as a "vanilla" file regardless of the number of
       channels or sample format.
-* `Reader` and `Writer` can now be constructed using with an open `IO` instance,
-  to allow reading/writing using an arbitrary `IO`-like object (`File`,
-  `StringIO`, etc). Previously, they could only be constructed from a file name
-  (given by a String). Thanks to [@taf2](https://github.com/taf2) for suggesting
-  this feature and providing an example pull request.
-* The buffer size in `Reader.each_buffer()` is now optional. If not given, a
+* Reader and Writer can now be constructed using with an open IO instance,
+  to allow reading/writing using an arbitrary IO-like object (File, StringIO,
+  etc). Previously, they could only be constructed from a file name (given by
+  a String). Thanks to [@taf2](https://github.com/taf2) for suggesting this
+  feature and providing an example pull request.
+* The buffer size in Reader.each_buffer() is now optional. If not given, a
   default buffer size will be used.
-* Two `Duration` objects will now evaluate to equal if they represent the same
-  amount of time, due to an overridden definition of `==`. Thanks to
+* Two Duration objects will now evaluate to equal if they represent the same
+  amount of time, due to an overridden definition of ==. Thanks to
   [Christopher Smith](https://github.com/chrylis) for suggesting this improvement.
-* A `ReaderClosedError` is now raised (instead of `IOError`) when attempting to
-  read from a closed `Reader` instance. However, `ReaderClosedError` extends
-  `IOError`.
-* A `WriterClosedError` is now raised (instead of `IOError`) when attempting to
-  read from a closed `Writer` instance. However, `ReaderClosedError` extends
-  `IOError`.
+* A ReaderClosedError is now raised (instead of IOError) when attempting to
+  read from a closed Reader instance. However, ReaderClosedError extends
+  IOError.
+* A WriterClosedError is now raised (instead of IOError) when attempting to
+  read from a closed Writer instance. However, ReaderClosedError extends
+  IOError.
 * **Backwards Incompatible Changes**
-  * `Reader.file_name` and `Writer.file_name` have been removed. When a `Reader`
-     or `Writer` instance is constructed from an `IO` instance, this field
+  * Reader.file_name and Writer.file_name have been removed. When a Reader
+     or Writer instance is constructed from an IO instance, this field
      wouldn't necessarily have a sensible value. Since I don't know of an obvious
      use-case for these fields, going ahead and removing them altogether.
-  * The long deprecated ability to provide the sample format for a `Format`
+  * The long deprecated ability to provide the sample format for a Format
     instance as an integer (implying PCM format) has been removed. For example,
-    this is no longer valid: `Format.new(:mono, 16, 44100)`. Instead, use
-    `Format.new(:mono, :pcm_16, 44100)`.
+    this is no longer valid: Format.new(:mono, 16, 44100). Instead, use
+    Format.new(:mono, :pcm_16, 44100).
 
 
 0.7.0