web/links/index.htm: use initial blank line to indicate author comment at start of bookmark desc

lib/Firefox_bookmarks.reformat.csv: label page's description: don't label a bookmark desc starting with a blank line (indicating an author-added comment) as a page's description

lib/Firefox_bookmarks.reformat.csv: label page's description: don't label an author-added quotation (which starts with " ) as the page's description

bin/in_place: set the permissions of the new file to the original file when `chmod --reference` is available. this ensures that when a file is marked web-accessible, it stays web-accessible when you run an in_place command on it.

web/links/index.htm: BitTorrent Sync: security warning about data leak: added link to reported bug at http://forum.bittorrent.com/topic/18612-security-hole-in-linux-webui-makes-all-your-files-publicly-accessible/ . updated workaround instructions.

web/links/index.htm: updated to Firefox bookmarks. BitTorrent Sync: added security warning that running btsync on Linux will by default create a publicly-accessible, unprotected WebUI, allowing anyone on the web to create a sync folder to view and edit any of your files. to avoid this, always run btsync with a config file which sets a password on the WebUI. if you have already run btsync, run `killall btsync` to turn off the WebUI.

web/links/index.htm: updated to Firefox bookmarks. changes include links about BitTorrent Sync.

lib/Firefox_bookmarks.reformat.csv: label <meta> description: renamed label text to "page's description" to be understandable to non-programmers

lib/Firefox_bookmarks.reformat.csv: label <meta> description: remove any existing description label, to avoid duplicating the description label when the text of the description label changes

lib/Firefox_bookmarks.reformat.csv: label <meta> description as such to avoid confusing it with comments added by the bookmark author, who may not agree with it. the <meta> description is in the 1st paragraph(s), when provided.