fix getLiteral problem (#37)

Register 'commonmark/hard_break' as an custom option

So we have all the default parameters in one place,
and not hidden within the renderer function.
Also adapt the 'getOption' function such that it

Register 'commonmark/hard_break' as an custom option

So we have all the default parameters in one place,
and not hidden within the renderer function.
Also adapt the 'getOption' function such that it is able
to retrieve both, leage-commonmark options as well as our
custom registered commonmark options.

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Remove further ignored default parameters from function calls

The given default parameter is not taken into account anyways
(a source of confusion), and it will get in the way when we
change the fun

Remove further ignored default parameters from function calls

The given default parameter is not taken into account anyways
(a source of confusion), and it will get in the way when we
change the function signature later, for individual commonmark
options.

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Implement optional soft break rendering

When the option 'render_softbreaks' is on, use the same
line break characters as for hart breaks.
Also, define the hart break string inside the
'Commonmark.ph

Implement optional soft break rendering

When the option 'render_softbreaks' is on, use the same
line break characters as for hart breaks.
Also, define the hart break string inside the
'Commonmark.php' config, not in the renderer itself.

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Add option 'render_softbreaks' to the Web GUI

A checkbox in the dokuwiki configuration menu to select,
weather softbreaks should be rendered or not.

Remove 'default' parameter from function 'getOption'

The underlying 'get' function from 'environment'
->'getConfiguration()'->'get()' does not have a default
parameter any more.

Use of 'mergeConfig' deprecated.

Merge branch 'hardbreak'

Fix heading with link

fix action.php

fix headinginfo

Use CoreInlineElement for Newline

fix html tag escape

Fix spurious spaces around inline elements

Without this fix, the code adds a block separator after each element,
which translates to a space before and after each element, including
bold, italics, e

Fix spurious spaces around inline elements

Without this fix, the code adds a block separator after each element,
which translates to a space before and after each element, including
bold, italics, etc. This is especially visible when the element is
followed by punctuation.

The fix makes the code only add a block separator after block elements.

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fix list rendering issue with strikethrough text

Revert "add logic for additional image link rule"

This reverts commit 50c6b1ddef623a1cad3c79c6336583faeca76ef4.

add logic for additional image link rule

add DW wikilink syntax converter

Revert "auto parsing slash to colon inside wikilink"

This reverts commit 41bb96e58a7e78dafbb7d90816ef3412ade890ed.

auto parsing slash to colon inside wikilink

fix frontmatter rendering issue

fix frontmatter check

add frontmatter tag process option

Move tag location to bottom

add VERY basic support of frontmatter_based tag