-Moved drug application test examples
    -Supressed Expected Warning in process_gene()
test-dgidb.R:
    -Now Uses testthat package for R unit testing
        -Supports three unique tests
            -get_interactions(search='genes')
            -get_interactions(search='drugs')
            -get_drug_applications()
        -Currently the tests only expect that no error occurs during the test
    -Moved to seperate test folder
    -Now Uses microbenchmark package for R benchmarking
        -A benchmark is run on the each test function following the inital test
            -Currently the benchmark samples 10 runs of the function and reports the average,min,max,etc execution time

Performed lintr styling to test.dgidb.R

Fixed testthat file structure using usethis::use_testthat()

Used usethis::create_package() to setup barebone structure of an R package

in testthat.R: library(rdgidb) does not function, as rdgidb needs to be installed locally as a package to be loaded. Now: the devtools package is used to load the local instance of rdgidb and use it for testing without need for installing the package.

Added project dependencies in DESCRIPTION. Additionally, the sub package of tidyverse, tidyr, was specified as a dependency, as opposed to all of tidyverse.

Added data.table and httr to imports in DESCRIPTION