Removed unneeded header style filename #defines

Fixing more broken and split doc comments.

Super duper mega (fun!) commit: replaced encoding=utf-8 with fileencoding=utf-8 in all 1074 Vim modelines. The reason for this is that (a) setting the encoding isn't nice, and (b) Vim 7.3 (with modeline enabled) disallows it and pops up an error whenever you open any file with it ("invalid modeline"). Also corrected five deviant modestrings: * src/ui/widget/dock.cpp and src/ui/widget/dock.h: missing colon at the end * src/ui/dialog/tile.cpp: removed gratuitous second colon at the end * src/helper/units-test.h: removed gratuitous space before a colon * share/extensions/export_gimp_palette.py: missing textwidth=99 That's my geekiest commit yet.

fix nodetype determination. fixes lpe spiro bug

fix nodetype determination. more stable now. (lost symmetry detection, nobody is using it yet). fixes lpe-spiro.

remove debug messages from last commits

try to make more robust geom-nodetype. still it can give wrong types. (best tested with lpe-spiro after next svncommit, change the smoothness/cusp at the closing endpoint)

improve get_nodetype angle checking, thanks nathan!

add comment and implementation of get_nodetype where both curves are zero_length or only one of them.

add geom-nodetype. helper function to determine the nodetype between two curves