Fraqtive 0.4.5 released

It's been a long time since the last release, but I finally decided to make a new version. The main new feature in this release is the possibility to generate high quality fractal images of arbitrary size (up to 4000 x 4000 pixels) and save them in PNG, JPEG, TIFF, BMP or PPM format. Also a few minor bugs were fixed. Finally, a new improved installer for Windows was created, allowing to install Fraqtive for current user or all users and using a much smaller, compressed executable file.