Rudamentary tail implementation.

For specific info on missing features and optimizations,
look at tail/README.md
Add the ability to install coreutils (resolves #216)
Add some installation instructions
Clarify uninstallation instructions
Merge pull request #228 from Arcterus/install-target

Add the ability to install coreutils (resolves #216)
Merge pull request #225 from molysgaard/master

Rudamentary tail implementation.
md5sum: update rust-crypto
tail: fix build by changing uint to u64
Merge pull request #230 from Arcterus/rust-crypto

Fix build
playground : paragraph splitting in Haskell
treat blank lines correctly
a quick implementation of "tight" breaking
simplified Knuth-style break ; randomize indent

implemented a simplified Knuth-style linebreaking algorithm

- penalize for different stretch ratio on successive lines
- attempt to bound stretch of last line

randgen.pl now randomizes the indent of each paragraph
Merge branch 'playground' of ssh://github.com/kwantam/coreutils into playground