[evolution-ews/wip/cmake] Mention CMake in the README file

[Milan Crha <mcrha src gnome org>]

commit d89c6d2530cc82f21498cb8188037d3eb395c74b
Author: Milan Crha <mcrha redhat com>
Date:   Wed Oct 5 10:52:35 2016 +0200

    Mention CMake in the README file

 README |   15 ++++++++++++---
 1 files changed, 12 insertions(+), 3 deletions(-)
---
diff --git a/README b/README
index e19cbff..97ffb70 100644
--- a/README
+++ b/README
@@ -2,9 +2,18 @@
 
 1. BUILD
 
-   $ ./autogen.sh
-   $ make
-   $ make install
+   $ cd .../sources/evolution-ews
+   $ mkdir build
+   $ cd build
+   $ cmake -G "Unix Makefiles" \
+           -DCMAKE_INSTALL_PREFIX=/opt/evolution \
+           -DCMAKE_BUILD_TYPE=Release \
+           ..
+   $ make -j
+   $ make -j install
+
+Run `cmake --help` to get list of available generators (the -G argument)
+on your platform.
 
 ========================