Prepare v1.4.0 release

.version

@@ -1 +1 @@
-1.3.1
+1.4.0

ChangeLog.md

@@ -1,13 +1,27 @@
 Stlink ChangeLog
 ================
 
-v1.3.2
+v1.4.0
 ======
 
-Release date: ongoing
+Release date: 2017-07-01
+
+Major changes and added features:
+
+* Add support for STM32L452 target ([#608](https://github.com/texane/stlink/pull/608))
+* Initial support to compile with Microsoft Visual Studio 2017 ([#602](https://github.com/texane/stlink/pull/602))
+* Added support for flashing second bank on STM32F10x_XL ([#592](https://github.com/texane/stlink/pull/592))
+* Add support for STM32L011 target ([#572](https://github.com/texane/stlink/pull/572)) 
+* Allow building of debian package with CPack (@xor-gate)
 
 Updates and fixes:
 
+* Fix compilation with GCC 7 ([#590](https://github.com/texane/stlink/pull/590))
+* Skip GTK detection if we're cross-compiling ([#588](https://github.com/texane/stlink/pull/588))
+* Fix possible memory leak ([#570](https://github.com/texane/stlink/pull/570))
+* Fix building with mingw64 ([#569](https://github.com/texane/stlink/pull/569), [#610](https://github.com/texane/stlink/pull/610))
+* Update libusb to 1.0.21 for Windows ([#562](https://github.com/texane/stlink/pull/562))
+* Fixing low-voltage flashing on STM32F7 parts. ([#567](https://github.com/texane/stlink/pull/567))
 * Update libusb to 1.0.21 for Windows ([#562](https://github.com/texane/stlink/pull/562))
 
 v1.3.1