Improve the description of the compilation step in the INSTALL file a…

…nd the Blaze tutorial

INSTALL

@@ -35,7 +35,7 @@ vi ./Configfile
 In the 'Configfile', the kind of installation (debug or release), the library types (static and/or
 dynamic), the compiler including compiler flags, and several include paths have to be specified.
 Afterwards, the 'configure' script can be run, which uses the 'Configfile' to update and create
-several files:
+several files (including header files):
 
 ./configure
 
@@ -53,7 +53,10 @@ Windows Users
 -------------
 
 Unfortunately, for Windows users there is no 'configure' script available (yet). Therefore Windows
-users have to manually configure the Blaze library in the './blaze/config/' subdirectory.
+users have to manually configure the Blaze library. Most configuration headers are located in the
+'./blaze/config/' subdirectory. The one exception is the 'BLAS.h' header in the './blaze/system/'
+subdirectory that contains the configuration of the BLAS functionality. Note that in case the
+'BLAZE_BLAS_MODE' symbol is set to 1, the correct BLAS header file has to be specified!
 
 
 Step 2: Installation
@@ -99,9 +102,10 @@ Step 3 (Optional): Compilation
 Linux/MacOSX Users
 ------------------
 
-If certain extended functionality, such as for instance blaze::ThreadPool or the blaze::logging
-functionality, is required, it is necessary to create the Blaze library files. For that purpose,
-the 'configure' script has created a 'Makefile' that can be used for the compilation process:
+Next to the math library, Blaze also contains a small number of additional (sub-)libraries. If
+these libraries, such as blaze::ThreadPool or the blaze::logging functionality, are required
+it is necessary to create the Blaze library files. For that purpose, the 'configure' script has
+created a 'Makefile' that can be used for the compilation process:
 
 make
 

blaze/Blaze.h

@@ -161,8 +161,11 @@ namespace blaze {}
 // \n \subsection step_1_configuration_windows Windows User
 //
 // Unfortunately, for Windows users there is no \c configure script available (yet). Therefore
-// Windows user have to manually configure the \b Blaze library in the <em>./blaze/config/</em>
-// subdirectory.
+// Windows user have to manually configure the \b Blaze library. Most configuration headers are
+// located in the <em>./blaze/config/</em> subdirectory. The one exception is the \c BLAS.h
+// header in the <em>./blaze/system/</em> subdirectory that contains the configuration of the
+// BLAS functionality. Note that in case the \c BLAZE_BLAS_MODE symbol is set to 1, the correct
+// BLAS header file has to be specified!
 //
 //
 // \n \section step_2_installation Step 2: Installation
@@ -212,10 +215,10 @@ namespace blaze {}
 //
 // \subsection step_3_configuration_unix Linux/MacOSX User
 //
-// If certain extended functionality, such as for instance blaze::ThreadPool or the blaze::logging
-// functionality, is required, it is necessary to create the \b Blaze library files. For that
-// purpose, the \c configure script has created a \c Makefile that can be used for the compilation
-// process:
+// Next to the math library, \b Blaze also contains a small number of additional (sub-)libraries.
+// If these libraries, such as blaze::ThreadPool or the blaze::logging functionality, are required
+// it is necessary to create the \b Blaze library files. For that purpose, the \c configure script
+// has created a \c Makefile that can be used for the compilation process:
 
    \code
    make