Merge pull request #352 from simonster/static

Fix unused static parameters
Add MIME type outputs
Fix AsyncStream errors
Fix MIME warnings
fixed some test case errors
changed from deprecated `contains` to `in`
Merge pull request #357 from tanmaykm/contains

Moved from `contains` to `in` and fixed a few tests
Update 03_io.md

Decimal default specified as comma, when default is actually period.
Merge pull request #358 from randyzwitch/patch-1

Update Documentation for I/O section, decimal character
Clean up unary operators
Clean up matrix multiplication

May need additional tests
Only define the necessary similar operator, and make it accept types
Clean up comparison operators
Clean up arithmetic operators
Clean up most remaining operators, and restore operator lists for now
Remove cov_spearman and colffts from tests
Move all macros to top
Make operator arrays const