update doxygen build instructions

refer to README.md

doc/soem.dox

@@ -3,7 +3,7 @@
  *
  * \section start Tutorial
  * For a tutorial on SOEM  See tutorial.txt
- * 
+ *
  * \section overview Overview
  * SOEM is an EtherCAT master library written in c. Its purpose is to learn and
  * to use. All users are invited to study the source to get an understanding
@@ -55,7 +55,7 @@
  * - Support for Little and Big endian targets.
  *
  * Features as of 1.1.3 :
- * - CoE, TxPDO and RxPDO, master is client (beta). 
+ * - CoE, TxPDO and RxPDO, master is client (beta).
  * - FoE, Read and Write file (beta).
  *
  * Features as of 1.1.4 :
@@ -114,24 +114,16 @@
  * - Error messages updated to latest ETG1020 document.
  * - FoE transfers now support busy response.
  *
- * \section start Getting started
+ * \section build Build instructions
  *
- * For Linux
- * - go to project directory
- * - source ./setup.sh linux 
- * - make all
+ * See README.md in the root folder.
+ *
+ * \section start Getting started
  *
  * For examples see simple_test.c in ~/test/linux/simple_test.
  * First try (assume EtherCAT on eth0): sudo ./simple_test eth0
  * As SOEM uses RAW sockets it will need to run as root.
  *
- * For Windows
- * - have winpcap installed (included with WireShark)
- * - go to project directory
- * - for VC, run vcvarsall.bat
- * f.e. : C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\vcvarsall.bat x86
- * - run make_test_win32_all.bat
- *
  * \section bugs Squashed bugs
  * Version 1.1.3
  * - Added missing Big-Endian conversion in ethercatconfig.c
@@ -186,7 +178,7 @@
  * - Added intime target.
  * - Added rtk\fec target.
  * - Compiles under gcc / visual-c / intime / borland-c .
- * - Added multi-threaded configuration for parallel configurations of slaves  
+ * - Added multi-threaded configuration for parallel configurations of slaves
  *
  * \section legal Legal notice
  * Copyright© 2005-2015 Speciaal Machinefabriek Ketels v.o.f. \n
@@ -222,4 +214,4 @@
  * In case you did not receive a copy of the EtherCAT Master License along with
  * SOEM write to Beckhoff Automation GmbH, Eiserstrasse 5, D-33415 Verl, Germany
  * (www.beckhoff.com).
- */ 
+ */