Update newTiddler paramifier to take arguments

[jdlrobson]

In certain cases it is useful to be able to generate a link to a new tiddler with some prefilled tags/custom fields.

This could be achieved by modifying the newTiddler paramifier to treat the string as a parameter string when a title keyword is used.

#newTiddler:[[title:"hello world" tag:foo tag:bar fields:"color:red"]]

would create a new tiddler called "hello world" tagged with foo and bar and the custom field color set to red.

#newTiddler:[["hello world" tag:foo tag:bar fields:"color:red"]]

however would create a tiddler called "hello world" tag:foo tag:bar fields:"color:red"

This would increase the power of the existing mechanism. Suggested patch attached.

[FND]

As discussed elsewhere, I disagree with the second example: If you want to use the parameterized version, the title parameter should be mandatory to avoid ambiguity.

[MartinBudden]

Fixed in changeset:12734