Fix issue55: two new contants added
Fix issue55: [ method, the first rewrite
Fix issue55: export of constants
Fix issue55: clean up and implementation of warnings
Fix issue55: bugfix
Fix issue55: sorting of columns in case of numeric dimensions
testar och felar
testErr bufixes
issue55 data.table as the only output
issue55: .all is redefined + small bugfixes
issue55: data.frame/data.table and a new principle for writing them
[#55] Update tests
issue55: x-problem is addressed by more exotic internal variable name
Merge branch 'issue55' of https://github.com/SwedishPensionsAgency/Coldbir into issue55
[#55] Update tests
[#55] Update tests
[#55] Update code comment
[#74] Allow for NULL as argument in [ and [[
issue55: simplified output loop för ']'
[#55] Fix data.table related issue