hgweb: fix too short manifest link

hgweb: make viewing of non-text work in hgweb We use mimetypes.guess_type to guess file types and util.binary to determine whether a file is displayable as text. This lets us display displayable text files in our normal source view. Files that appear to be binary will be displayed as something like "(binary:image/gif)". Clicking on raw view will send the raw file with an appropriate MIME type. Thus things like GIFs will now be viewable inside hgweb without making a mess. Further, things like postscript files that are text should show source in the normal view and a browser can launch a postscript viewer for the raw view.

hgweb: shorten all the URLs in the standard templates A URL like this: http://www.selenic.com/hg/?cmd=changeset;node=5010207c35273ac1331cae44c253dd41fa07cb7f is now presented as: http://www.selenic.com/hg/?cs=5010207c352 (though the old style still works, of course)

hgweb: add shortcuts for all the web commands / fix empty arg bug

symlink unit test

allow empty values for url so we can have /?tip

hgweb: allow urls to be shorter by using shortcuts for example cs=xxx will be expanded to cmd=changeset;node=xxx

log: speedup keyword search when used with --branch By avoiding unnecessary branch lookup.

log: make keyword search truly case-insensitive

lazyindex fix, make load handle negative indexes properly.

i18n part2: use '_' for all strings who are part of the user interface

use a dummy function for gettext import gettext is really slow, until we figure out a solution we use identity for gettext

i18n first part: make '_' available for files who need it

Try to use ini-file in the same directory as the exe as the default on NT.

make update quieter when nothing is wrong sometimes when i am going around in my history, i get long lists of errors from the update command. this patch will fix that. i tried to make the code style the same like the rest of the code.

bdiff: change spurious __inline to inline