[v1.0] Podlite markup language specification

[zag]

New:

• Notification blocks, :notify attribute for =nested blocks,

• :folded attribute,

• :folded-levels for =toc block,

• Refactor Named custom blocks and markup custom codes, M<>,

• embedding binary data into documents, =data, :filename, :encoding,

• :mime-type attribute for =include and =data blocks,

• introduce data: schema for use in =picture and =table,

• render tables from CSV files, =table,

• new markdown mode for parser,

• M<> - extends inline markup features,

• add :id, :caption, :lang attributes,

• task lists, =item and :checked attribute,

• intro Selectors,

• table of contents, =toc,

• include block, =include,

• inserting pictures, =picture, P<>,

• mathematical formulas, =formula, F<>,

• Markdown support, =markdown,

• mistake marking, O<>,

• text positioning, J<>, H<>,

• Emoji, E<>,

• contextual backlinks, W<>,

• advanced table format, =row,=cell blocks, :header, :rowspan, :colspan attributes.

Deprecated/removed:

• Contextual aliases,

• =finish,

• markers in comments,

• :margin attribute,

• =encoding directive,

• P<toc:> due to =toc block,

• P<man:>, P<doc:> due to =include block,

• P<> - placement links,

• Declarator block,

• :formatted attribute,

• :like attribute.