C.13 Release 0.9-5

Added some functionality, but more importantly corrected two nasty font bugs.

• Added options -bp, to set initial bitmap size based on paper sizes and -Qp to list the sizes available. Added option -PC to turn off cropping, which is useful if you want output of a certain size.
• Fixed a bug which caused fonts loaded at magnified sizes to be requested at the wrong size, even though, when they were found to be missing, the correct font-generation command was being issued.
• Fixed the longish-standing bug to do with spacing at smaller font sizes: cmr7 and cmr12 now look as their maker intended.
• Corrected a bug which caused page-selection to be done subtly wrongly (font selections were being ignored, and byte values of 140 in DVI data would have caused merry hell).
• configure script: The configuration for PNG now doesn't rely on a libpng version better than 0.96. Font-generation is now enabled by default, despite the potential for confusion, which should be covered in the documentation.
• Added better diagnostics to InputByteStream.cc, so that if it goes wrong, you're given at least a clue why.