- Fixing DDS reader so it doesn't require the source pitch/linear size field to be divisible by 4

- Fixing DDS writer so it writes a non-zero pitch/linearsize field (a few DDS readers in the wild require this field to be set)
- Fixing example2.cpp and example3.cpp so they write non-zero pitch/linearsize fields.
- Misc merges from the ddsexport branch
- Adding -usesourceformat command line option, useful when reprocessing a lot of existing DDS files.

crnlib/crn_core.cpp

@@ -3,5 +3,5 @@
 #include "crn_core.h"
 #include "crn_winhdr.h"
 
-char *g_copyright_str = "Copyright (c) 2010-2011 Tenacious Software LLC";
+char *g_copyright_str = "Copyright (c) 2010-2012 Tenacious Software LLC";
 char *g_sig_str = "C8cfRlaorj0wLtnMSxrBJxTC85rho2L9hUZKHcBL";