Multiple CMS improvements

* Fixed test server reloading
* Use unichr() instead of chr() to be Unicode-safe
* Allow Markdown in HTML blocks
* Allow defining per-repository template filters
* Don't convert page-relative links
* Don't throw an exception for missing directories (test server only)
* Case-insensitive comparison of file extensions
* Serve correct MIME type for JPEG images in test server

[Sebastian Noack, 2013-12-11 11:38:29]

http://codereview.adblockplus.org/5567002995326976/diff/5629499534213120/site...
File sitescripts/cms/converters.py (right):

http://codereview.adblockplus.org/5567002995326976/diff/5629499534213120/site...
sitescripts/cms/converters.py:186: if ext != ".py":
You might want to compare the file extension case-insensitive.

http://codereview.adblockplus.org/5567002995326976/diff/5629499534213120/site...
sitescripts/cms/converters.py:195: if func not in module.__dict__:
You should use the getattr/setattr/hasattr/delattr family of built-in functions
instead of accessing __dict__ directly, when possible, so in this case:

hasattr(module, func)

http://codereview.adblockplus.org/5567002995326976/diff/5629499534213120/site...
sitescripts/cms/converters.py:197: filters[func] = module.__dict__[func]
See above:

getattr(module, func)

http://codereview.adblockplus.org/5567002995326976/diff/5629499534213120/site...
sitescripts/cms/converters.py:198: filters[func].__module__ = module  # Prevent
garbage collection
The __module__ attribute of objects is supposed to be the name (not the
instance) of the module, which is already set correctly here.

Instead you should put the module into sys.modules, where all imported modules
store their references.

[Wladimir Palant, 2013-12-11 12:05:19]

http://codereview.adblockplus.org/5567002995326976/diff/5629499534213120/site...
File sitescripts/cms/converters.py (right):

http://codereview.adblockplus.org/5567002995326976/diff/5629499534213120/site...
sitescripts/cms/converters.py:186: if ext != ".py":
On 2013/12/11 11:38:29, sebastian wrote:
> You might want to compare the file extension case-insensitive.

Then we should do the same everywhere else where we look at file extensions.

http://codereview.adblockplus.org/5567002995326976/diff/5629499534213120/site...
sitescripts/cms/converters.py:198: filters[func].__module__ = module  # Prevent
garbage collection
On 2013/12/11 11:38:29, sebastian wrote:
> The __module__ attribute of objects is supposed to be the name (not the
> instance) of the module, which is already set correctly here.

Ok, clashing with a predefined property was unintended, I changed that into
property name into module_ref.

> Instead you should put the module into sys.modules, where all imported modules
> store their references.

I explicitly didn't want to put this into sys.modules - that isn't a real
module, rather a temporary execution context for a filter. We reload filters on
each use, messing with somebody's import statements wasn't the idea.

[Sebastian Noack, 2013-12-11 12:59:57]

LGTM