Added regex patterns for file names of the 3 products (3B43, 3B42_daily and 3B42), Patterns are waiting into the sandbox.R script
extended trmm2time function to deal with 3B43 product (monthly data)
Added import package dataset in examples documentation
First version of the stacking function (probably works only for subsetted single layer datasets)
Added details about limitations of the function in timeStackTRMM
Merge branch 'develop'