Translation of UI (german and english)

Bugfix for feeds
    - removed categories related and up
    - load new books now working
    - category random now working
login page is free of non accessible elements
boolean custom column is vivible in UI
books with only with certain languages can be shown
book shelfs can be deleted from UI
Anonymous user view is more resticted
Added browse of series in sidebar
Dependencys in vendor folder are updated to newer versions (licencs files are now present)
Bugfix editing Authors names
Made upload on windows working

vendor/jinja2/__init__.py

@@ -27,7 +27,7 @@
     :license: BSD, see LICENSE for more details.
 """
 __docformat__ = 'restructuredtext en'
-__version__ = '2.7'
+__version__ = '2.8'
 
 # high level interface
 from jinja2.environment import Environment, Template
@@ -42,7 +42,8 @@ from jinja2.bccache import BytecodeCache, FileSystemBytecodeCache, \
      MemcachedBytecodeCache
 
 # undefined types
-from jinja2.runtime import Undefined, DebugUndefined, StrictUndefined
+from jinja2.runtime import Undefined, DebugUndefined, StrictUndefined, \
+     make_logging_undefined
 
 # exceptions
 from jinja2.exceptions import TemplateError, UndefinedError, \
@@ -65,5 +66,5 @@ __all__ = [
     'TemplatesNotFound', 'TemplateSyntaxError', 'TemplateAssertionError',
     'ModuleLoader', 'environmentfilter', 'contextfilter', 'Markup', 'escape',
     'environmentfunction', 'contextfunction', 'clear_caches', 'is_undefined',
-    'evalcontextfilter', 'evalcontextfunction'
+    'evalcontextfilter', 'evalcontextfunction', 'make_logging_undefined',
 ]