accept strings in constructor

[MaxBittker]

this will look for string-like inputs, and parse them correctly into patch sets, allowing the syntax in
#26

I'm happy to update examples/tests or otherwise improve this if you feel iffy about the implementation or behavior.👍

[MaxBittker]

@matiasb hey there, there's no rush acting on this but I wanted to bring it to your attention in case it slipped through 👍

[matiasb]

In my queue! I'll be taking a look soon.
Thanks for the quick patch 👍

[MaxBittker]

awesome, thanks. not high priority but I don't want to forget about it and I think it's helpful

[matiasb]

I'm still not convinced the init should guess the type before parsing, given there is an explicit classmethod for strings. In that way, it is responsibility of the caller to decide which constructor to use (and for example, if there is something that should be treated as string but it is not a string, he/she could make the decision instead of us guessing it wrong).

I'm merging the change, codewise looks good, but I think it may mutate before a next release. Thanks!