Resolve relative URLs in feed content

Set xml:base attribute on entry container, in order to resolve
any relative URLs in the entry against the feed's URL.
Merge pull request #10 from ancestorak/resolve-relative-urls

Resolve relative URLs in feed content
Better localization notes for plural forms
Increase version to 1.7
Update localizations for 1.7.
Update localization paths in chrome.manifest for 1.7
Credit new translators for ja and tr
Simplify FeedView._fillWindow(), part 1.

lastEntryInCenter check can be factored in enoughEntriesPreloaded.
This not only simplifies the code but also makes FeedView._onEntriesAdded()
take lastEntryInCenter into account which it should have done.
Simplify FeedView._fillWindow(), part 2

The early return is unnecessary, it's simpler to just invert the conditions.
Fix FeedView._fillWindow() to respect aWindowHeights argument.

The constants WINDOW_HEIGHTS_LOAD and INITIAL_WINDOW_HEIGHTS_LOAD
didn't actually work because of this.
FeedView._onEntriesAdded() should reset _allEntriesLoaded.
Fix: checking "Show number of unread items" doesn't initially show the counter.

Brief.onPrefChanged() cannot use |this| to call Brief.updateStatus(),
because the function isn't bound to the Brief object.
Fix a typo that breaks OMPL exporting.
The fix for table corruption should be run only once, on upgrade.
Remove unused entities
merge internal functions into onItemRemoved
retreive parent info before yield in onItemRemove

If the last child of a tag folder is being removed, the folder itself
will be removed next. It will likely be not available after the async
call resumes onItemRemove, so let's obtain the information we'll need
before async calls.
Merge pull request #30 from Tanriol/fix-untagging

Fix removing tags that was broken by bookmark observer API changes, namely the obsoletion of nsINavBookmarkObserver.onBeforeItemRemoved().
Remove redundant code from BookmarkObserver.onItemChanged()

Livemark titles are immutable now.
Status in Places should take precedence in Query.verifyBookmarksAndTags()