update dependency information

README.md

@@ -20,10 +20,20 @@ The MiracleCast projects requires the following software to be installed:
  - **glib**: A utility library. Used by the current DHCP implementation. Will be removed once sd-dns gains DHCP-server capabilities.
     *required*: ~=glib2-2.38 (might work with older releases, untested..)
 
+ - readline**: A library which is used to provide command line interface to control wifid, sink, etc..
+
  - **check**: Test-suite for C programs. Used for optional tests of the MiracleCast code base.
     *optional*: ~=check-0.9.11 (might work with older releases, untested..)
 
- - **gstreamer**: MiracleCast relay on gstreamer to show cast its output. You can test if all needed is installed launching [res/test-viewer.sh](https://github.com/albfan/miraclecast/blob/master/res/test-viewer.sh)
+ - **gstreamer**: MiracleCast rely on gstreamer to show cast its output. You can test if all needed is installed launching [res/test-viewer.sh](https://github.com/albfan/miraclecast/blob/master/res/test-viewer.sh).
+
+ - gstreamer plugins: here are the gstreamer plugins you need in order to run sinkctl or wfdctl
+     - gstreamer-plugins-base
+     - gstreamer-plugins-good
+     - gstreamer-plugins-bad
+     - gstreamer-plugins-ugly
+     - gstreamer-plugins-vaapi
+     - gstreamer-plugins-libav
 
  - **P2P Wi-Fi device** Although widespread these days, there are some devices not compatible with [Wi-Fi Direct](http://en.wikipedia.org/wiki/Wi-Fi_Direct) (prior know as Wi-Fi P2P). Test yours with [res/test-hardware-capabilities.sh](https://github.com/albfan/miraclecast/blob/master/res/test-hardware-capabilities.sh)
 

src/ctl/CMakeLists.txt

@@ -1,4 +1,4 @@
-find_package(Readline)
+find_package(Readline REQUIRED)
 ########### next target ###############
 
 set(miracle-wifictl_SRCS ctl.h