Python 2.6 is minimal

CMakeLists.txt

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 70bfbbd..b261b67 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -177,9 +177,9 @@
 
 IF( BUILD_PYTHON )
   MESSAGE(STATUS "Building Python bindings" )
-  FIND_PACKAGE(PythonLibs 2.7 REQUIRED)
+  FIND_PACKAGE(PythonLibs 2.6 REQUIRED)
   IF (PYTHON_LIBRARY)
-    FIND_PACKAGE(PythonInterp 2.7 REQUIRED)
+    FIND_PACKAGE(PythonInterp 2.6 REQUIRED)
     MESSAGE(STATUS "Found PythonLibs...")
     FIND_PACKAGE(PythonLinkLibs)
     IF (PYTHON_LINK_LIBS)