Fix missing 5.3->5.4 updates

README.md

@@ -68,8 +68,8 @@ Supported builds for Linux are 32 or 64-bit, built using gcc.
 * For Ubuntu: Please be aware that the time of writing, Qt5.4 is unavailable in the official repositories Ubuntu 14.04/Mint 17.*.
     * Add this PPA to your sources.list: `ppa:beineri/opt-qt54-trusty`
     * Run the following in your terminal: `sudo apt-get update && sudo apt-get install qt54tools qt54base qt54declarative qt54serialport qt54svg qt54webkit qt54quickcontrols qt54xmlpatterns qt54x11extras qt54websockets qt54sensors qt54script qt54quick1 qt54qbs qt54multimedia qt54location qt54imageformats qt54graphicaleffects qt54creator qt54connectivity`
-    * Next, set the environment variables by executing in the terminal: `source /opt/qt53/bin/qt53-env.sh` or copy and paste the contents to your `~/.profile` file to set them on login.
-    * Verify that the variables have been set: `echo $PATH && echo $QTDIR`. The output should read `/opt/qt53/bin:...` and `/opt/qt53`.
+    * Next, set the environment variables by executing in the terminal: `source /opt/qt54/bin/qt54-env.sh` or copy and paste the contents to your `~/.profile` file to set them on login.
+    * Verify that the variables have been set: `echo $PATH && echo $QTDIR`. The output should read `/opt/qt54/bin:...` and `/opt/qt54`.
 
 #### [Optional] Install additional libraries
 * For text-to-speech (espeak)