Filter out .tpl and .in and documentation file names

Those suffixes are commonly used for files that are processed during
build to produce some final version.

Fixes #169.

rust2rpm/__main__.py

@@ -241,7 +241,7 @@ def get_doc_files(path):
         README[.-].*|CHANGELOG|CHANGELOG[.-].*|TODO|TODO[.-].*
         """,
         re.IGNORECASE | re.VERBOSE)
-    minus = re.compile(r"CMakeLists\.txt")
+    minus = re.compile(r"CMakeLists\.txt|.*\.tpl|.*\.in")
 
     for root, dirs, files in os.walk(path, topdown=True):
         dirs[:] = []