add travis.yml support + test files

.travis.yml

+language: python
+python:
+  - "3.6"
+
+notifications:
+  email: false
+
+install:
+    - pip install -q cython numpy networkx scipy scikit-learn pandas
+    - python setup.py build_ext --inplace
+
+script:
+  - pytest gmatch4py/test/test.py
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gmatch4py/graph.pyx

@@ -305,17 +305,4 @@ cdef class Graph:
                     
         return Graph(G,self.node_attr_key,self.edge_attr_key)
 
-
-    cpdef test(self):
-        print(self.has_node("1"))
-        print(self.has_edge("1","2"))
-        G2=Graph(["1","2","3","4"],[("1","2"),("2","3"),("1","4")],[2,2,1],[2,2,1])
-        print(self.size_node_union(G2))
-        print(self.size_node_intersect(G2))
-        print(self.size_edge_union(G2))
-        print(self.size_edge_intersect(G2))
-
-if __name__ == "__main__":
-    G=Graph(["1","2","3"],[("1","2"),("2","3")],[1,2,1],[1,2,1])
-    G.test()
-
+    
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gmatch4py/test/test.py

+import pytest
+    
+
+def nimport():
+    # Gmatch4py use networkx graph 
+    import networkx as nx 
+
+
+def test_import():
+    nimport()
+
+def ged():
+    import networkx as nx
+    # import the GED using the munkres algorithm
+    
+
+def test_ged():
+    ged()
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