added short informations about library and how to build it

README.md

@@ -1,11 +1,33 @@
-libvhdl
-=======
+# libvhdl
 A library of reusable components for VHDL designs and testbenches
 
-sim
----
+##sim
 (Non) synthesible components for testbenches
 
-test
-----
-Unit test for each component
+##### QueueP
+Package with various implementations of queue types:
+
+* `t_simple_queue` simple array based FIFO queue
+* `t_list_queue` linked list FIFO queue using access types
+
+
+##test
+Unit tests for each component
+
+##### QueueT
+Units tests for components of QueueP package
+
+## Dependencies
+To run the tests, you have to install GHDL. You can get it from [http://sourceforge.net/projects/ghdl-updates/](http://sourceforge.net/projects/ghdl-updates/).
+
+## Building
+Type `make` and you should see the successfully running tests
+
+```
+$ make
+ghdl -a --std=02 ../sim/QueueP.vhd QueueT.vhd
+ghdl -e --std=02 QueueT
+ghdl -r --std=02 QueueT
+QueueT.vhd:52:5:@0ms:(report note): INFO: t_simple_queue test finished successfully
+QueueT.vhd:87:5:@0ms:(report note): INFO: t_list_queue test finished successfully
+```