Revert "disable tree vectorization optimizations"

This reverts commit c5c5c4d7ecd42181f2b4e7f5c19cd6a41a524785.
Merge pull request #91 from gtalusan/kobo

Revert "disable tree vectorization optimizations"
Revert "Fix webkit textbox top position bug"

This reverts commit c0fe3133ed2f93a6ec843d15ba9c70909e187022.
Merge pull request #92 from butku/kobo

Revert "Fix webkit textbox top position bug"
check a Resources directory for hyphenation dictionaries
Merge pull request #93 from gtalusan/kobo

check a Resources directory for hyphenation dictionaries
Merge in webkit commit 41db3c1 - Unexpected word wrapping for wrapped content then raw content.
https://bugs.webkit.org/show_bug.cgi?id=121130

Original commit details:
When deciding whether a line is considered empty, we need to check if the current
object is fully responsible for the currently uncommitted width. It helps differentiating
<span></span><span>abcd</span> from <span>a</span><span>bcd</span>, where in the first
case when we hit the second <span> the line is still considered empty, as opposed to the
second example.
Merge pull request #94 from dlapchuk/kobo

Merge in webkit commit 41db3c1 - Unexpected word wrapping for wrapped content then raw content.
Decrease the threshold to apply bilinear filtering in image resizing to improve performance.
Merge pull request #95 from butku/kobo

Decrease the threshold to apply bilinear filtering in image resizing to improve performance.
enable subpixel text layout and a bunch of other stuff that sounds useful
Merge pull request #96 from gtalusan/kobo

enable subpixel text layout and a bunch of other stuff that sounds useful
Revert "allow breaking of words so that Japanese text doesn't get cut off"

This reverts commit 9c0ec863115080b63a985b26efc1d792f831d02d.
Merge pull request #97 from butku/kobo

Revert "allow breaking of words so that Japanese text doesn't get cut of...
[DE7926] expose methods to get rects for all selected text
Merge pull request #98 from zxu/DE7926

[DE7926] expose methods to get rects for all selected text