adding windowing and more options to plotting function time series

plotting function time series, fixing bugs

adding ploting time series function in the assessment product part 1 function script

fixing bugs in combining extracted predicted values and observations from assessement

modifying function for function for combining extracted values

adding functions to product assessment part1: extracting from raster and combining data to assessment stage

add query function to select stations from given sets of points with lat and long for assessment

testing subsampling by distance function to select specific given stations from points

adding quick function to extract from data.frame

modifying gclip polygons and points function for use in the assessment