added a readme

README.md

@@ -1 +1,32 @@
 # FEM
+This is a simple finite element solver, solving hexaheadral elements with
+bubble functions. A complete documentation is shown in
+doc/doc.pdf
+The code is tested to compile using gcc on divers linux systems.
+
+Type make
+
+Watch the sample in sample.input
+
+Type ./hex_fem_solver sample.input and you are ready to go.
+
+LICENSE
+(c) 2018 Thomas Haschka
+
+This software is provided 'as-is', without any express or implied
+warranty. In no event will the authors be held liable for any damages
+arising from the use of this software. 
+
+Permission is granted to anyone to use this software for any purpose,
+including commercial applications, and to alter it and redistribute it
+freely, subject to the following restrictions: 
+
+    The origin of this software must not be misrepresented; you must
+    not claim that you wrote the original software. If you use this
+    software in a product, an acknowledgment in the product
+    documentation would be appreciated but is not required. 
+
+    Altered source versions must be plainly marked as such, and must
+    not be misrepresented as being the original software.
+
+    This notice may not be removed or altered from any source distribution.