Style updates missed off the last commit
Another select widget demo
Update instructions.tid to use one of the included addons

This addon is already included into the plugin, but is not used, neither mentioned how to use it. It is a very useful but lightweight addon. I consider it is better to include the full functionality of the current configuration in the config example.
Docs updates on Reporting Bugs
Introduce savetiddlers command

Allows us to save tiddlers in their raw format.
Allow the text widget to refresh if needed
Add demo PDF image

That cat again
Typo in 305617b632fd6ecf25cd4be85f4dfb5a5a65dfef

Tsk
Docs update
Introduce setfield command

This new command will let us do the manipulations needed to set up
external image tiddlers
Update HTML parser to use an IFRAME

Gives us better sandboxing of unsafe HTML content
Update chinese translations for Help tiddlers
Update chinese translations for Help tiddlers
First pass at external image support

A bunch of little changes that together enable external image support.
Try:

```
tiddlywiki editions/tw5.com --verbose --build externalimages
```

Then open `externalimages.html`, look for the images in the more/types
tab of the sidebar, open them and verify that they are set with an
external SRC attribute, not a data URI.
Start using the build command in batch files
Merge remote-tracking branch 'upstream/master'
Support global macros via the importvariables widget

The new importvariables widget imports macro/variable definitions from
the specified tiddlers and makes them available to its children.

Allows us to split PageMacros up into separate tiddlers.

We still support loading macros from $:/core/ui/PageMacros to help
people upgrading.

Fixes #644 and #559
Docs update
Release note and doc updates for 5.0.13
Merge pull request #647 from BramChen/master

Update chinese translations for Help tiddlers