our .getISannual() function 
///////////////////////////////
Step #1:upload two R packages
        library(tidyverse)
        library(rvest)
   
        Note: if they were not preinstalled, issue the following
              commands to install them. 
        install.packages("tidyverse")
        install.packages("rvest")

Step #2: Example of using .getBSannual()
          > x<-.getBSannual("ibm")
              BS for  IBM  was successfully downloaded 
          > head(x)
                 Period Ending 12/31/2018 12/31/2017 12/31/2016 12/31/2015
        1            Current Assets          -          -          -          -
        2 Cash And Cash Equivalents 11,379,000 11,972,000  7,826,000  7,686,000
        3    Short Term Investments    618,000    608,000    701,000    508,000
        4           Net Receivables  8,596,000 10,380,000 10,239,000  9,534,000
        5                 Inventory  1,682,000  1,583,000  1,553,000  1,551,000
        6      Other Current Assets  2,902,000  2,266,000    532,000    293,000
         > dim(x)
           [1] 37  5
/////////////////////////////////

our .getCFannual() function 
///////////////////////////////
Step #1:upload two R packages
        library(tidyverse)
        library(rvest)
   
        Note: if they were not preinstalled, issue the following
              commands to install them. 
        install.packages("tidyverse")
        install.packages("rvest")

Step #2: Example of using .getBSannual()
          > x<-.getBSannual("ibm")
              BS for  IBM  was successfully downloaded 
          > head(x)
                 Period Ending 12/31/2018 12/31/2017 12/31/2016 12/31/2015
        1            Current Assets          -          -          -          -
        2 Cash And Cash Equivalents 11,379,000 11,972,000  7,826,000  7,686,000
        3    Short Term Investments    618,000    608,000    701,000    508,000
        4           Net Receivables  8,596,000 10,380,000 10,239,000  9,534,000
        5                 Inventory  1,682,000  1,583,000  1,553,000  1,551,000
        6      Other Current Assets  2,902,000  2,266,000    532,000    293,000
         > dim(x)
           [1] 37  5
/////////////////////////////////