Fix release of CatTrap 0.4 (as I should've called it...)

Test table lowering

Bridge rowspan/colspan from HTML to CSS via useragent stylesheet.

Support colspan on column elements.

Parse & apply CSS <table>-styling properties.

Allow styling table columns & rows!

Implement table layout.

Implement basic table layout.

Implement more of <table> layout

Expose text data from main module.

Improve concurrency, release 0.3, & (not in 0.3) better expose text info

Give up on addressing all memory leaks.

Upload missing files.

Segfault/performance fixes.

Performance optimizations: Concurrency, & move download/styling/layout to out-of-thread.

Fix for Balkon update.

Fix inline sizing, handle length units for callers.

Draft integration test against Stylist & HURL, shelve due to incomplete Text v2 transition.

Integrate text-alignment support!

Fix Balkon's behaviour regarding lack of additional whitespace.