Wire up the split in preview button (not yet implemented)
Quick view: Show the title/author/series columns in the same order as in the main book list. Fixes #1253022 [[Enhancement] Quickview column order](https://bugs.launchpad.net/calibre/+bug/1253022)

Merge branch 'master' of https://github.com/cbhaley/calibre
Syntax highlight non breaking hyphens as well as non breaking spaces
Update Hyphenator library to 4.2.0
E-book viewer: Allow searching for whole words to work with hyphenation

E-book viewer: Allow searching to work with hyphenation enabled,
provided you are searching for whole words. Searching for partial words
may still not work. For robust searching, turn off hyphenation in the
viewer preferences.
Refactor out loc to node into a separate function
Prevent splitting inside tables
Refactor tree splitting code to make it re-useable
Splitting implemented
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Test for file splitting
Handle rating and numeric columns for Kobo shelves

Kobo driver: Fix errors when using rating or numerical custom columns to
create shelves. Fixes #1253637 [Kobo driver has error when rating column used for shelves](https://bugs.launchpad.net/calibre/+bug/1253637)

Convert the category to string in case a numeric column is used. For a
rating column, divide the value by two.
Use unicode instead of str when typecasting
pep8
Dont use dynamic CS in Tweak Book
Titlecase: Fix incorrect title casing for some non-English words. Fixes #1253692 [Change Case captalizes letter after accented character](https://bugs.launchpad.net/calibre/+bug/1253692)
Add SONY T3 to welcome wizard
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Nicer version number in update notification
Report undecodeable font paths