compiling from source

Ben mentioned this as a possibility in https://github.com/amiaopensource/ffmprovisr/issues/351

I think that this could come in very handy for those of us who occasionally need to compile things like mediainfo/ffmpeg/rawcooked/dvdrip(!) when testing out a branch or something.

So I'm thinking of the simplest scenarios like:
'If a project has a configure file, you may just need to `cd` into the directory that contains the configure script, and run:
```
./configure && make
```
and if you wish to install the build so that it is accessible from all folders, you can run
`make install`

However you may need to have several dependencies installed, such as `gcc`, `g++`, `make`, `autotools` etc. You often just have to keep trying and keep fixing each error that pops up. For example you may get an error saying that `libtoolize not found`, so a quick google search should let you know how to install that dependency for your operating system. In the case of `ubuntu`, it is `apt install libtool`.