Translations. Icelandic translation update, new win32 installer, and new default template.

Fix for bug #690255 (Rename te_IN.po to te.po).

win32 nsis installer: fix portuguese brazil translation, add more inkscake translations

Translations. Adding Telugu (te_IN) in win32 nsh files.

Farsi support in win32 packages and Inkscape preferences

A big lot of work for the Inkscape installer. I really should have done this on a local branch and merged it in, or done it as at least half a dozen commits, but I haven't done that along the way and I'm not going to do it now for this batch of work. * Languages: simplified language files, using core NSIS LangFile header file. * Version numbering: version number is fetched from src/inkscape-version.cpp and .bzr/branches/last-revision. * NSIS 2.46 now required to compile, POSIX cross-compilation may no longer work due to ifexist.nsh (I'll see if I can fix it after installing Ubuntu with more reverse-hacks to use different !system calls on different platforms). * Still a lot of work to do actually fixing the uninstall script so it works (next on my list of jobs for the installer). * Simplified a few bits of code (e.g. code duplication into ${For} $2 0 1 in one place I'd missed it). * Quoted some things and unquoted some things which did/didn't need quotes... mainly for style and the fun of it. * Fixed a minor bug somewhere, can't remember what it was! * Segmented code carefully into parts (with full folding in Vim) * Added a few chunks of documentation as to what to do with inkscape.nsi... and now a long commit message too (I seem to like doing that) ;-)