Narrative Web: Fix alphabetic navigation bar and sorting in index pages using PyICU where available. Implements most collate contractions for western languages Gramps has been translated into. This fixes the following bugs:

0002933: Problems in Narrative Web Report with surnames beginning with V or W. Use collation primary difference to define index groupings. Special case for 'V' and 'W' in Swedish removed because the default CLDR has a primary difference between them.

0003434: NarrativeWeb new alphabet index sorted incorrectly. Fix Cyrillic sort order, and contractions for Slovak and Czech (among other languages).

0003933: References inside pages in NarWeb report and non-ascii characters. Sorting issues for Polish characters.

0004423: Web report does not handle Czech "CH" character properly. Dz contraction is not present in the CLDR. Slovak is similar.

0005088: Narrated Web Site Report sort order different Windows vs Linux. Resolved by using PyICU (if available).

0005645: can't sort greek names

0005767: Sorting in Narrative Webb does not work correctly. Fix sorting in Individuals, Surnames, Families, Events and Places to use PyICU (if available). This bug covers sorting in the index header (as well as in the body of the index pages).

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/trunk@21509 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
0003428: When running with pythonw.exe, Windows may crash if you write to stdout. Some more print statements changed to log.warning.

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/trunk@21512 4ae1f11a-8b86-4847-b8af-ab372f36d1fd