meteoinfo/MeteoInfo: v1.8

Add any, all, vstack and hstack functions in numeric package. Add delnan, smooth5 and smooth9 functions in numeric package. Add arrow, arrowline, annotate functions in plotlib package. Add minorticknum and tickwidth arguments in xaxis and yaxis functions. Use itext as pdf output library for better pdf image output. add more distributions in random module. Update high dpi image output functions. Fixed some bugs.