Updated INSTALL instructions

INSTALL

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+INSTALLATION:
+============
+
+Open a terminal and navigate to the directory containing cmdtypist and all 
+it's files.
+-In the directory, run the command
+
+					./install.sh 
+to install the program. Enter password to complete installation.
+
+Alternatively, you can use cmdtypist without running the ./install.sh script.
+You will need to navigate to the program directory each time you want to run
+it. install.sh helps you run it from any directory.
+
+RUNNING:
+=======
+
+If you successfully executed the install.sh script, then you can run cmdtypist 
+using the command
+
+	begin; cmdtypist argument1 argument2 argument3
+
+where argument is a valid cmdtypist argument, to know all valid arguments run
+the cmdtypist help command.	
+
+Note that the begin command must be followed by a comma.
+begin helps you navigate to cmdtypist directory. Alternative, you can first 
+run begin alone and then run cmdtypist.
+
+If running cmdtypist produces a "Fatal error: some files are missing error"
+then you probably did not run with begin; 
+cmdtypist is installed in home directory