CMake: make docs and code consistent.

- Document the version requirements more accurately

CMakeLists.txt

@@ -96,7 +96,7 @@ set( QT_VERSION 5.7.0 )
 set( YAMLCPP_VERSION 0.5.1 )
 set( ECM_VERSION 5.18 )
 set( PYTHONLIBS_VERSION 3.3 )
-set( BOOSTPYTHON_VERSION 1.54.0 )
+set( BOOSTPYTHON_VERSION 1.55.0 )
 
 
 ### CMAKE SETUP

README.md

@@ -15,11 +15,12 @@
 Main:
 * Compiler with C++11 support: GCC >= 4.9.0 or Clang >= 3.5.1
 * CMake >= 3.2
-* Qt >= 5.6
+* Qt >= 5.7
 * yaml-cpp >= 0.5.1
-* Python >= 3.3
+* Python >= 3.3 (required for some modules)
-* Boost.Python >= 1.55.0
+* Boost.Python >= 1.55.0 (recommended, or PythonQt; one is required for some modules)
-* extra-cmake-modules (recommended; required for some modules)
+* PythonQt (recommended, or Boost.Python; one is required for some modules)
+* extra-cmake-modules >= 5.18 (recommended; required for some modules)
 
 Modules:
 * welcome:
@@ -38,6 +39,6 @@ Modules:
 ### Building
 
 See [wiki](https://github.com/calamares/calamares/wiki) for up to date
-[building](https://github.com/calamares/calamares/wiki/Developer's-Guide)
+[building](https://github.com/calamares/calamares/wiki/Develop-Guide)
-and [deployment](https://github.com/calamares/calamares/wiki/Deployer's-Guide)
+and [deployment](https://github.com/calamares/calamares/wiki/Deploy-Guide)
 instructions.