quick fix for semver dependency during install

{{cookiecutter.repo_name}}/{{cookiecutter.repo_name}}/__init__.py

@@ -16,10 +16,12 @@
 """
 {{cookiecutter.project_short_description}}
 """
+from __future__ import print_function
 
-import semver
 from .version import __version__
 
+try:
+    import semver
     __version_info__ = semver.parse_version_info(__version__)
 
     if __version_info__.prerelease:
@@ -32,3 +34,5 @@ if __version_info__.prerelease:
         else:
             import sys
             print(msg, file=sys.stderr)
+except ImportError:
+    print('semver not installed. Not doing version checking')