hgweb: add ajaxScrollInit function, which does the ajax requests and processing This function should be correctly called on a page, otherwise there is no effect. When called, it makes ajax requests for the next portion of changesets when the user scrolls to the end. Also, when the monitor is high so that the default amount of changesets isn't enough to fill it, multiple portions are loaded if needed after the page load.

check-code: add bracket style check

util.h: getbe32() and putbe32() use intrinsic function to improve performance Refer to https://bugzilla.mozilla.org/show_bug.cgi?id=351557. It can improve byte-swapping performance by intrinsic function.

hgweb: add appendFormatHTML javascript function This is a convenient helper function to append some formatted HTML markup to a DOM element.

hgweb: add removeByClassName javascript function It removes all elements with specified class name from the document.

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

hgweb: add makeRequest javascript function This function performs an asynchronous HTTP request and calls provided callbacks: - onstart: request is sent - onsuccess: response is received - onerror: some error occured - oncomplete: response is fully processed and all other callbacks finished

hgweb: add format javascript function It replaces placeholders like '%key%' with replacement values given.

hgweb: add nextentry variable for easy pagination in changelog nextentry always contains the first entry not shown on current page (if there is such entry)

hgweb: always compute all entries and latestentry in changelog Get the whole list of entries before rendering instead of using lazy evaluation. This doesn't affect the performance for usual case when the entries are shown anyway. When both entries and latestentry are used, this performs unnoticeably faster, and for pages which use only latestentry (quite uncommon case) it would be a bit slower. This change will make it possible to get the first entry of the next page easily without computing the list twice.