Prevent excessive logging when BaseClient.unzip(...) fails (#169)

* Changed base.unzip() to prevent excessive logging

* #112 Changed logging of full unzip content to debug level.

This is based off of PR #112 discussion.

* #112 Reverted whitespace changes to caiso.py

This is based off of PR #112 discussion.

Author: r24mille

.gitignore

@@ -56,4 +56,4 @@ htmlcov
 # Certificate key files
 *.pem
 
-.DS_Store
+.DS_Store

pyiso/base.py

@@ -309,7 +309,8 @@ def unzip(self, content):
             # have zipfile
             z = zipfile.ZipFile(filecontent)
         except zipfile.BadZipfile:
-            LOGGER.error('%s: unzip failure for content:\n%s' % (self.NAME, content))
+            LOGGER.error('%s: unzip failure for content beginning:\n%s' % (self.NAME, str(content)[0:100]))
+            LOGGER.debug('%s: Faulty unzip content:\n%s' % (self.NAME, content))
             return None
 
         # have unzipped content