Use a https link for the default author link template

Fixes #1190952 [please use https where possible for external requests](https://bugs.launchpad.net/calibre/+bug/1190952)
MOBI Output: Fix rasterizing of svg images

MOBI Output: Fix rendering of SVG images that embed large raster images
in 64bit calibre installs.
Fixes #1191020 [Conversion to mobi (from ePub) removes inserted images](https://bugs.launchpad.net/calibre/+bug/1191020)
Avoid unnecessary QUrl round-tripping
DOCX Input: Add support for contextual spacing

DOCX Input: Add support for the Word setting "No space between
paragraphs with the same style". Fixes #1191001 [docx conversion bug](https://bugs.launchpad.net/calibre/+bug/1191001)
Move TOC creation into its own module
Bulk metadata: focus the Review instead of OK

After a bulk metadata download, focus the review button on the
popup notification, instead of the OK button. Fixes #1190931 [Newly custom added columns keep disappearing on restart](https://bugs.launchpad.net/calibre/+bug/1190931)
DOCX Input: Support webHidden

DOCX Input: Hide text that has been marked as not being visible in the
web view in Word.
...
Remove incorrect rendering of separator field chars

Unconditionally rendering the separator is wrong, for example, for the
TOC field it causes an extra space at the start of the first entry. In
any case, many common fields are webHidden, so they dont display anyway.
DOCX Input: Support for Word created ToC

DOCX Input: Support for Table of Contents created using the Word Table
of Contents tool. calibre now first looks for such a Table of Contents
and only if one is not found does it generate a ToC from headings.
E-book viewer: Make bookmark button instant popup

E-book viewer: Change the bookmark button to always popup a menu when
clicked, makes accessing existing bookmarks easier.
Merge branch 'master' of https://github.com/GRiker/calibre

Fix #1066922 [Catalog shows content under symbols](https://bugs.launchpad.net/calibre/+bug/1066922) again.
DOCX Input: Fix image name generation

DOCX Input: When converting docx files with large numbers of unnamed
images, do not crash on windows. Fixes #1191354 [Word docx conversion](https://bugs.launchpad.net/calibre/+bug/1191354)
Get Books: Fix error when using internal browser

Get Books: Fix error when using internal browser on some systems. I
cannot replicate this error so my fix is speculative, based on the idea
that not keeping explicit references to the python object is causing
them to be garbage collected. Fixes #1191199 [Python exception downloading books from Barnes & Noble](https://bugs.launchpad.net/calibre/+bug/1191199)
Fix PIL import
DOCX Input: Detect likely cover image

DOCX Input: If a large image that looks like a cover is present at the
start of the document, remove it and use it as the cover of the output
ebook. This can be turned off under the DOC Input section of the
conversion dialog.
various minor fixes
new Polish news sources
new icons for recipes
Merge branch 'master' of https://github.com/fenuks/calibre

New and updated Polish news sources.