hgweb: add docFromHTML javascript function
It takes a string with HTML markup and creates DOM document from it.
The implementation is a part of code from
https://developer.mozilla.org/en-US/docs/Web/API/DOMParser#DOMParser_HTML_extension_for_other_browsers
Mercurial
=========
Mercurial is a fast, easy to use, distributed revision control tool
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Basic install:
$ make # see install targets
$ make install # do a system-wide install
$ hg debuginstall # sanity-check setup
$ hg # see help
Running without installing:
$ make local # build for inplace usage
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See http://mercurial.selenic.com/ for detailed installation
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