Incorrect header inclusion

Hello,

I have some trouble installing libbf. After doing:

./configure
make
make install

libbf is installed here:

> tree /usr/local/include/            
/usr/local/include/
├── bf
│   ├── all.hpp
│   ├── bitvector.hpp
│   ├── bloom_filter
│   │   ├── a2.hpp
│   │   ├── basic.hpp
│   │   ├── bitwise.hpp
│   │   ├── counting.hpp
│   │   └── stable.hpp
│   ├── bloom_filter.hpp
│   ├── counter_vector.hpp
│   ├── h3.hpp
│   ├── hash.hpp
│   ├── object.hpp
│   └── wrap.hpp

I cant find the file bf.h specified in the current readme.
In fact :

#include <bf.h>

int main(){
    bf::bloom_filter* h;
    return 0;
}

does not work, neither do :

#include <bf/bf.h>

int main(){
    bf::bloom_filter* h;
    return 0;
}

However,

#include <bf/all.hpp>

int main(){
    bf::bloom_filter* h;
    return 0;
}

does work, as specified in https://github.com/mavam/libbf/issues/32

1 - Should I open a merge request to update the readme ?

I have to install a project that uses libbf, and that project does:
#include <bf.h>
But it does not specify which version of libbf was used.

2 - Do you know if a previous version of libbf could be installed by including bf.h ? In such case, which version is it ?

I also used libbf in one of my project, and it worked great ! Thank you for your library.

Start with the current README's bf.h examples and compare them with the installed include tree shown in the report; also review issue #32 for the expected include form. Check the repository history to determine whether bf.h existed in an earlier version, then update the README with the supported header and any confirmed version guidance.