Improve the section for Lambda and Function Literal

Because, in D, "Lambda" is a kind of function literal.
fix Issue 10848 - Compiler should always try to inlining a direct lambda call
Use $(D ) for various D code highlighting rather than $(B )
Merge pull request #463 from 9rnsr/grammar

Use $(D ) for various D code highlighting rather than $(B )
Add a small TOC entry for the DDOX based docs as an alternative to the normal ones.
Update DDOX resource for the latest version (new icons and search support).
Reduce font size for search results.
Properly integrate the "apidocs" targets with "all" and let DUB keep the "dpl-docs" tool up to date.

Also keeps the line length to 80 characters and adds missing resource files to posix.mak.
Fix width of the search box and the position of the results pane.
Merge pull request #462 from s-ludwig/master

DDOX based docs fixes and additions
Merge pull request #372 from 9rnsr/fix10848

[enh] Issue 10848 - Compiler should always try to inlining a direct lambda call
Fix bug in .cloned target
Update dbc.dd

square_root(9) shall not return 2 (previous contract allows that)
Merge pull request #464 from andralex/clone

Fix bug in .cloned target
Merge pull request #465 from tcoserea/patch-1

Update dbc.dd
fix typo
Merge pull request #466 from majiang/patch-1

fix typo
Change __attribute -> __attribute__
Split rows for supported vector operators and assignment operators
Add 256-bit vector types and supported operators table