New file filters

new filters added on open and save dialogs.  Supported extensions
included are:
text
flash action script
ada
assembly language file
active server pages
unix script file
c source file
c++ source file
c# source file
css files
d programming language
fortran source file
haskell
hyper text markup file
java source file
javascript
javaserver pages
lua
pascal
perl
php
postscript
python
ruby
smalltalk
sql
visual basic
extensible markup languages