[Pixman] Documentation is incorrect

[Programmingkid]

The INSTALL document found in the root level of Pixman needs to be updated. It states that ./configure; make; make install is all that is need to build Pixman. It is really ./autogen.sh; ./configure; make; sudo make install. 

On the other hand, it might be better to eliminate the autogen.sh step and just place anything it did into the ./configure file.