Update build.md regarding cmake

docs/pages/docs/build.md

@@ -11,20 +11,22 @@ Tags: Manual Building an executable and running LaGriT
 The executable is built by linking a driver routine with the code and
 utility libraries. The driver routine must contain a call to initLaGriT
 and a call to control_command_lg and must contain a subroutine called
-user_sub.  The input arguments to initLaGriT are:
+user_sub.  
+
+The input arguments to initLaGriT are:
 
 **mode** - set to 'noisy' for output to be echoed to the screen - set to
 'silent' for no echo
 
 **log_file** - name of log file (if ' ' or '-def-' use default name which
-is logx3dgen)  This file will contain a list of commands.
+is lagrit.log)  This file will contain a list of commands.
 
 **batch_file** - name of batch file (if ' ' or '-def-' use default name
-which is outx3dgen). This file will contain a list of commands and the
+which is lagrit.out). This file will contain a list of commands and the
 error, warning and informational messages generated by the command.
 User_sub is used to implement user commands, see [User Commands](writing.md).
 
-A sample driver routine is listed below:
+A sample Fortran driver routine is listed below (C++ examples are in examples/liblagrit/):
 
 <pre>
 program adrivgen
@@ -82,11 +84,31 @@ C    For example
 
 ### Sample build scripts
 
-LaGriT can be compiled on most modern machines including Linux, Mac, and WINDOWS.
+LaGriT can be compiled on most modern machines including Linux, Mac, and WINDOWS. LaGriT uses cmake to build with or without external libraries such as Seacas Exodus. 
+
+The most recent instructions can be found on the github pages.
+
+
+Simple install, build, and test: [LaGriT Github README](https://github.com/lanl/LaGriT/README.md)
+
+Build options and instructions for developers: [LaGriT Github cmake README](https://github.com/lanl/LaGriT/cmake/README.md)
+
+
+
+### Running LaGriT
 
-*Note examples may be out of date, see [LaGriT Github](https://github.com/lanl/LaGriT)*
+To execute, use standard unix file redirection for standard input and
+output. LaGriT will produce two additional files, lagrit.out and
+lagrit.log. The user can change the names of these files by supplying new
+names as arguments in the call to initLaGriT before compiling.  These files contain
+detailed output information and the list of commands respectively.
+LaGriT may also be run interactively in which case the user will be
+prompted to enter commands at the machine prompt.
 
+    lagrit < lagrit_command_file
+
 
+### The following are examples to build old releases (pre V3.2) but may be helpful on older machines.
 
 **Sun OS and Sun Solaris forte version 7 compiler:**
 
@@ -185,10 +207,4 @@ where fdate.f is
 
 
 
-To execute, use standard unix file redirection for standard input and
-output. LaGriT will produce two additional files, outx3dgen and
-logx3dgen. The names of these files can be changed by supplying the
-names as arguments in the call to initLaGriT.  These files contain
-detailed output information and the list of commands respectively.
-LaGriT may also be run interactively in which case the user will be
-prompted to enter commands from the workstation.
+