Resolve "more links to fix"

See merge request OPAL/documentation/manual!98

fix link to Oxygen documentation

See merge request OPAL/documentation/manual!96

Version in title set to 2.4

See merge request OPAL/documentation/manual!95

Preliminary note removed for stable version

See merge request OPAL/documentation/manual!94

Update Manual.attributes

See merge request OPAL/documentation/manual!89

Resolve "Geometry command table layout broken"

See merge request OPAL/documentation/manual!93

Merge branch 'patch-3' into 'master'

See merge request OPAL/documentation/manual!91

Document PSYSTEM

See merge request OPAL/documentation/manual!90

(cherry picked from commit cb41a43f)

37941aaf Update control.asciidoc

Resolve "replace TABs with spaces in Manual.attributes"

See merge request OPAL/documentation/manual!88

Update Manual.attributes

See merge request OPAL/documentation/manual!87

Update Manual.attributes

See merge request OPAL/documentation/manual!86

Resolve "Fix links in gitlab environment"

Closes #25

See merge request OPAL/documentation/manual!85

All links to `gitlab.psi.ch` and `amas.web.psi.ch` are now defined as attributes in `Manual.attributes`. In a new branch, only this file must be changed to get the right links.

The header for rendering the chapters in `env-gitlab` is now defined in `env-gitlab.attributes`

Update Manual.macros

See merge request OPAL/documentation/manual!84

Update Manual.asciidoc

See merge request OPAL/documentation/manual!83

Update Manual.macros

See merge request OPAL/documentation/manual!82

Update Manual.asciidoc

See merge request OPAL/documentation/manual!81

Update Manual.macros

See merge request OPAL/documentation/manual!80

Update Manual.macros

See merge request OPAL/documentation/manual!79

Update Manual.asciidoc

See merge request OPAL/documentation/manual!78

Update Manual.asciidoc

See merge request OPAL/documentation/manual!77

Update Manual.asciidoc

See merge request OPAL/documentation/manual!76