Move defines to their own file

As described in
https://github.com/dwp-forge/columns/issues/5#issuecomment-638467603
sometime the Lexer constants have not been (auto)loaded when a syntax plugin
is in

Move defines to their own file

As described in
https://github.com/dwp-forge/columns/issues/5#issuecomment-638467603
sometime the Lexer constants have not been (auto)loaded when a syntax plugin
is invoked (I'm not sure why).

In general PSR2 discourages a mix of main code and function/class setup
with the call to define() being considered main code.

This patch moves these the define calls to a separate new file, solving
both of the above problems.

These are not all our defines. Instead I focused on the ones that are
ENUM-like.

In the future we should think about what defines can be replaced by
class constants and what other define() calls should be moved.

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fix phpdoc

Co-authored-by: Matthias Gutjahr <mattsches@gmail.com>

Fix accessing calls

Some plugins need access to the handler (and rewriter) calls. One
example is the do plugin.

This adds some accessing methods to the callWriter objects, ensures
$calls can be acc

Fix accessing calls

Some plugins need access to the handler (and rewriter) calls. One
example is the do plugin.

This adds some accessing methods to the callWriter objects, ensures
$calls can be accessed and removes some duplicate code by introducing an
abstract base class.

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Let plugins access the lexer mode stack

Fix php styling of too long regexp

Fixed broken link rendering for external links at start of line

External links at the start of line like 'www.example.com' were
not rendered as links any more. The issue was introduced with PR #1988

Fixed broken link rendering for external links at start of line

External links at the start of line like 'www.example.com' were
not rendered as links any more. The issue was introduced with PR #1988.
Fixes #2399.

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Restore some backwards compatibility for injected handlers

Some plugins, for example the move plugin, use their own handler class.
We need to give these plugins time to adjust their code.

This shou

Restore some backwards compatibility for injected handlers

Some plugins, for example the move plugin, use their own handler class.
We need to give these plugins time to adjust their code.

This should restore the functionality of the move plugin. We still need
to extract the handler class itself.

It also adds another debug method for triggering the deprecation event,
since none of the two existing methods are suitable here. This
dbgCustomDeprecationEvent method should be used sparingly and only where
the other two don't work.

Co-authored-by: Phy <git@phy25.com>

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Merge branch 'master' into psr2

* master:
upgraded JSON class to latest (2006) version
continue is break in switch
translation update
reference existing proper progress gif. fixes #2441
Fi

Merge branch 'master' into psr2

* master:
upgraded JSON class to latest (2006) version
continue is break in switch
translation update
reference existing proper progress gif. fixes #2441
Fix missing ui-bg_glass_95_fef1ec_1x400.png and be/jquery.ui.datepicker.js for jquery
removed accidental merges of outdated translations
Change `const` use to `var` for Safari 9 (on iOS)
Fix .htaccess files for Apache 2.4 (and 2.2)
add logic if the server uses unlimited memory settings in is_mem_available()
removed safemode hack

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Make lexer/state stack more understandable
- rename lexer $mode property to avoid two different uses of "mode"
variables in the lexer
- clarify/improve comments

do not use DOKU_PARSER_EOL outside of testing

moved Parser to Parsing namespace

moved all parsing related namespaces to their own