metatools 0.1.6

Breaking change: combine_supp() requires that the QNAM columns are not in the source dataset (#64)
Breaking change: build_from_derived() no longer requires all datasets with predecessors, but can run on a single dataset or multiple. It will also now accept unnamed datasets.
combine_supp() now allows multiple QNAM values to go to the same IDVAR (#63)
Allow supp data to be zero-row with combine_supp() (#45)
Enhance check_ct_data() so that na_acceptable can now accept a vector of variables. Also add new argument omit_vars to control if any variables should be skipped when doing controlled terminology checks (#57)
Add check_unique_keys() to check the uniqueness of records in the dataset by variable keys (#52)
Correct the description of build_from_derived() predecessor_only parameter

metatools 0.1.4

correct bug with combine_supp() when the data and the supp have white space. Now it will be trimmed before attempting to merge
Updates made to work with the newest version of dplyr

correct bug with build_from_derived() that prevented multiple from being combined
removed library calls from tests
remove floating_pt_correction from combine_supp() as it is best to never change the type of the main dataset
Add a message to drop_unspec_vars to explain which variables are dropped
Correct bug in order_cols, so it will still work when not all columns are present

correct bug with combine_supp() when the data and the supp have different classes for the IDVARVAL
add error to combine_supp() to report when not all the rows in the supp have merged
add floating_pt_correction argument to combine_supp() used for when there are floating point errors with IDVARVAL

Based on tester feedback, remove any row in supplemental qualifiers that are empty and rearranged the columns