Allow less strict dependencies

Fix #259

gns3/version.py

@@ -25,5 +25,5 @@ or negative for a release candidate or beta (after the base version
 number has been incremented)
 """
 
-__version__ = "1.3.1.rc3"
+__version__ = "1.3.1.dev4"
 __version_info__ = (1, 3, 0, 99)

setup.py

@@ -46,10 +46,10 @@ setup(
     long_description=open("README.rst", "r").read(),
     install_requires=[
         "apache-libcloud>=0.14.1",
-        "requests==2.4.3",
-        "paramiko==1.15.1",
-        "gns3-converter",
-        "raven==5.2.0"
+        "requests>=2.4.3",
+        "paramiko>=1.15.1",
+        "gns3-converter>=1.2.3",
+        "raven>=5.2.0"
     ],
     entry_points={
         "gui_scripts": [