Add package install information for Ubuntu

Tested on a clean ubuntu system.

libboost-random-dev was discovered at compile time, not at configure time
ld errors with libburritile_coverage.la

```
make  all-am
make[1]: Entering directory `/home/pnorman/burritile'
  CXXLD    libburritile_coverage.la
/usr/bin/ld: cannot find -larmadillo
/usr/bin/ld: cannot find -lpoppler
/usr/bin/ld: cannot find -lfreexl
/usr/bin/ld: cannot find -lepsilon
/usr/bin/ld: cannot find -lkmldom
/usr/bin/ld: cannot find -lkmlbase
/usr/bin/ld: cannot find -lkmlengine
/usr/bin/ld: cannot find -lkmlconvenience
/usr/bin/ld: cannot find -lminizip
/usr/bin/ld: cannot find -luriparser
/usr/bin/ld: cannot find -logdi
collect2: error: ld returned 1 exit status
make[1]: *** [libburritile_coverage.la] Error 1
make[1]: Leaving directory `/home/pnorman/burritile'
make: *** [all] Error 2
```
I recognize armadillo, poppler, freexl, epsilon, and kml as gdal related.