v1.5.0 Alpha 7

• add support for font-based icons (Jesse Doyle) (#15)
• enable font fallback support (Rei)
• add option to specify the background color for even table rows (Tord Heimdal) (#104)
• add block title for paragraphs (David Gamba) (#67)
• allow custom page size setting (Otavio Salvador) (#84)
• fix xref to sections (#56)
• fix xrefs to non-section content (#110)
• allow theme to control layout of title page (#135)
• allow theme to control style of table of contents (#167)
• allow running header & footer content to be customized (#89)
• tighten spacing between list items, make value configurable (#92)
• support CMYK color values (#155)
• add support for measurement values in theme (#156)
• name per-level heading theme keys consistently (e.g., heading_h<n>_font_size) (#157)
• preprocess theme data to allow # in front of hex colors (#158)
• support linkable images (#51)
• render table footer row (#123)
• don't crash if sectids attribute is disabled (#70)
• support text transform in theme (uppercase / lowercase) (#138)
• keep together shouldn't create blank pages (#150)
• properly resolve image target as system path (#87)
• show warning when image cannot be read (#148)
• allow page background image to be specified (#134)
• support PDF format as cover page (#113)
• accomodate numbered list with large numbers (#91)
• position list marker correctly (#140)
• allow theme to set font size & family of table cells (#139)
• unencode character entities in document title (#136)
• process callouts in listing & literal blocks (#31)
• use :center to vertically align table cell (#118)
• normalize endlines in table cell text (#116)
• support setting page size via attribute (#65)
• remove unused fonts; update version of NotoSerif font license file
• remove Asciidoctor theme until we're ready to fully implement
• restore source highlighting when nested inside block
• allow keys in theme to be nested to an arbitrary depth
• assign width to border for blockquote if not specified in theme
• support single value for font_fallbacks key in theme
• add support for font family and style per heading level
• implement basic converter for inline_indexterm
• coerce negative values in theme if they slip through
• use preserve_indentation in layout_prose
• support remote images
• add warning about unsupported gif format
• abort cli if option parsing returns exit code
• use SafeYAML to load theme files
• handle transparent value for table background colors
• reenable M+ 1p as the fallback font

A special thanks to @tomitribe for sponsoring the development of this release.