Log Message:
Sigil: update to 0.9.9.

Sigil-0.9.9
   Bug Fixes
    - Add python_3.5_fixes3.patch to Python build and update build docs on OSX \ 
to fix missing symbols
    - Fix crash caused by Preview holding pointer to user removed resource when \ 
front tab is non-html resource
    - Fix crash in FlowTab destructor due to re-entering flowtab during Syntax \ 
Highlighting and signals
    - Fix issue with file icons disappearing when reordering in Book Browser \ 
(commit ecb56b1f)
    - Fix missing epub3 Manifest cover-image property setting/unsetting with \ 
BookBrowser
    - Fix issue where cancelling the SaveAs dialog disconnected an existing epub \ 
from its saved path
    - Fix assertion error in sigil-gumbo when handling extraneous script end tags
    - Apply multiple fixes for gumbo from upstream
    - Fix segfault in Split at Cursor when not an html file
    - Make sure Add Cover tool properly handles existing manifest cover \ 
properties in EPUB3s
    - Correct error dialog to say "Sigil may need to close."
    - Prevent Images and Misc items from being dragged to the Text folder in \ 
Book Browser (commit 30bb96d)
    - Fix Linux bug that prevents rich text from other programs being pasted \ 
into Book View (issue #320)
    - Fix bug where index entries inside em and dfn tags were ignored during \ 
index generation
    - Fix bug on Windows in spell checking when smart right single quotes are \ 
used for apostrophes
    - Fix bug in simple well-formed check to handle generic xml processing \ 
instructions
    - Fix bug in epub3 MetaEditor with title-type and collection-type properties
    - Fix plugin code to prevent book href vs manifest id clashes
    - Fix bug in Plugin Runner to allow it to delete non-manifested files properly
    - Fix bug in SourceUpdates to handle properly handle css properties with \ 
multiple urls
    - Fix bugs in well-formed check to better handle missing doctypes

   New Features
    - Add SIGIL_DISABLE_CURSOR_BLINK environment variable to disable text cursor \ 
to aid Accessibility on OSX
    - Better use semantic information (guide types and Landmarks) to allow the \ 
user finer control of index generation
    - Attempt to improve Metadata Editor placeholder text to help beginners
    - Preview Window Title bar will now show height and width of the Preview Window
    - Allow users to limit/disable clipboard history saving via General Preferences
    - Convert br tags in header text to linebreaks for toc/ncx/nav generation \ 
routines
    - Support spell checking of words with numbers controlled by Preference settings
    - Add two additional Quick Lauch Icons for Plugins