Add --tac option and reverse display order of --no-sort

DISCLAIMER: This is a backward incompatible change

CHANGELOG.md

@@ -0,0 +1,32 @@
+CHANGELOG
+=========
+
+0.9.4
+-----
+
+#### New features
+
+- Added `--tac` option to reverse the order of the input.
+    - One might argue that this option is unnecessary since we can already put
+      `tac` or `tail -r` in the command pipeline to achieve the same result.
+      However, the advantage of `--tac` is that it does not block until the
+      input is complete.
+
+#### *Backward incompatible changes*
+
+- `--no-sort` option will no longer reverse the display order. You may want to
+  use the new `--tac` option with `--no-sort`.
+```
+history | fzf +s --tac
+```
+
+0.9.3
+-----
+
+#### New features
+- Added `--sync` option for multi-staged filtering
+
+#### Improvements
+- `--select-1` and `--exit-0` will start finder immediately when the condition
+  cannot be met
+