update package libpng
update package zziplib
package cblas: tidy up build, add missing blas dependency and build test programs
package lapack: enable C interface and add cblas link test
update package libpng
package qt: remove wrong dependency

libodbc++ has nothing to do with Qt's ODBC driver.
package qtbase: remove wrong dependency

libodbc++ has nothing to do with Qt's ODBC driver.
update package vmime
Merge https://github.com/mxe/mxe