- In sets, tables, strtabs, critbits, xmltree
- This uses the new var parameter overloading
- mget variants still exist, but are deprecated in favor of `[]`
- Includes tests and fixed tests and usages of mget
- The non-var `[]` now throws an exception instead of returning binary 0
or an empty string
Fixes an error with mpairs iterator which was introduced with 5fbcf93860. This is used by nimforum thats why I found it. I also added a testcase for the mpairs iterator.