Resolve "Improve Degrader description"

Closes #94

See merge request OPAL/documentation/manual!193

Resolve "Predefined string section"

Closes #93

See merge request OPAL/documentation/manual!192

Resolve "Modify documentation for Opal-cycl units"

Closes #92

See merge request OPAL/documentation/manual!191

Resolve "Modify documentation of momentum tolerance"

Closes #91

See merge request OPAL/documentation/manual!190

Resolve "Improve documentation for ascii2h5block tool"

Closes #89

See merge request OPAL/documentation/manual!188

Merge branch '90-documentation-of-ringdefinition-beam_thetainit-and-beam-momentum_tolerance' into 'master'

Resolve "Documentation of RingDefinition beam_thetainit and  Beam momentum_tolerance"

Closes #90

See merge request OPAL/documentation/manual!189

Update author list

See merge request OPAL/documentation/manual!185

Resolve "Update author list"

Closes #87

See merge request OPAL/documentation/manual!184

Resolve "Update statistics output"

Closes #86

See merge request OPAL/documentation/manual!182

Update autophase.asciidoc

See merge request OPAL/documentation/manual!183

Update fieldsolvers.asciidoc

See merge request OPAL/documentation/manual!181

Resolve "Fix indentation in P3M solver documentation"

Closes #85

See merge request OPAL/documentation/manual!180

Resolve "FieldSolver type P3M not documented"

Closes #41

See merge request OPAL/documentation/manual!177

Resolve "Trim coil description to be improved"

Closes #84

See merge request OPAL/documentation/manual!179

Resolve "Add Elegant multipole conversion"

Closes #83

See merge request OPAL/documentation/manual!178