[colm] Dependencies on a clean debian system

[Peter Reijnders]

Hello

Recently tested colm on a fresh/clean installed debian jessie system. It
appears that only the following dependencies (approximately 253 MB) are
needed to build colm from scratch.


```
apt-get install make libtool gcc g++ autoconf automake
```

To build the documentation, another 96 MB is needed.

```
apt-get install asciidoc 
```

Peter Reijnders