Implemented hardmin feature

[hrshbh]

Implemented the hardmin feature, as requested in issue #42 and issue #22 , along with other minor improvements.
softmin not implemented.

[tenox7]

Very nice! However you have also made some changes that do not concern hardmin feature. This makes it hard to read. Please split this PR in to smaller ones so that they can be addressed in a more granular meaner. Thank you!

[hrshbh]

Done. Now all changes strictly concern with hardmin.

[tenox7]

I would also like the other changes, just in a separate PR. Thank you!

[tenox7]

Thank you for submitting this. Works mostly awesome except the weird softmin issue and the usage/manual could use some improvement.

[hrshbh]

I agree, I was sloppy about the usage() and the manpage. I've tried to make them better, but if still changes are required in them, then I think you can amend it here before merging.

Regarding the softmin matter, I have added checks after parsing of args.

And as to the error response of value being less than hardmin, I was thinking of making as little changes as possible to the code, as it was beautiful already. Now, I've added a new error symbol, and included option to modify it.

[tenox7]

Hi, why did you close this? I would really like to get min/hardmin in to ttyplot.

[hrshbh]

Hi, the PR was in the open state for quite some time, without any response. So, I decided to close it.
Should I reopen this?
It's been almost a year, probably there will be some merge conflicts that will need to be resolved first.

[tenox7]

I really want to have it so I guess reopen it?

[hrshbh]

Thanks for the interest.
Will soon work to resolve the merge conflicts, if any.

[tenox7]

thanks! let me try it!

[tenox7]

Merged thank you very much!