bump version 6.6.0 (#223)

CHANGES.md

diff --git a/CHANGES.md b/CHANGES.md
index 9ef21cd..5c27541 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,6 +1,21 @@
 Apache CloudStack CloudMonkey Changelog
 ---------------------------------------
 
+Version 6.6.0
+=============
+This release includes:
+- Adds support for API request signing with HmacSHA512
+- Adds a switch command to change the active server profile from the shell
+- Adds support for configuring cmk through environment variables in addition to arguments
+- Adds autocompletion for virtual machines that belong to projects
+- Uses the Related metadata exposed by API discovery to pick the right list API for autocompletion
+- Fixes autocompletion for APIs whose noun ends in 'y', such as snapshot policies
+- Fixes a slice bounds panic in autocompletion
+- Fixes a nil pointer panic on sync when the management server returns an empty API list
+- Fixes filter=count output to avoid emitting empty objects
+- Switches to the maintained ergochat/readline library for the interactive shell
+- Improves repository automation, licence auditing and security documentation
+
 Version 6.5.0
 =============
 This release includes:

config/about.go

diff --git a/config/about.go b/config/about.go
index 1b8ed52..cf6442f 100644
--- a/config/about.go
+++ b/config/about.go
@@ -26,7 +26,7 @@
 
 // Version CLI
 func (c *Config) Version() string {
-	return "6.6.0-SNAPSHOT"
+	return "6.6.0"
 }
 
 // PrintHeader prints startup message in CLI mode

snap/snapcraft.yaml

diff --git a/snap/snapcraft.yaml b/snap/snapcraft.yaml
index 1b9ce6d..fbb3669 100644
--- a/snap/snapcraft.yaml
+++ b/snap/snapcraft.yaml
@@ -1,6 +1,6 @@
 name: cloudmonkey
 # define the tag anchor on the allowed 'version' field
-version: &release_tag 6.5.0
+version: &release_tag 6.6.0
 summary: Apache CloudStack CLI
 description: |
   A CLI and interactive shell that simplifies configuration and management of