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The Makefile was intented to be -Wall and not simply -W, but I missed
that. This enables more warnings and also enables -Werror (except for
the tests).

This patch optimizes the stdDev function in two respects:
  - first, we don't do sum . map which builds an intermediate list, but
	instead use a fold over the list to build incrementally the sum;
	this should reduce both the time and space characteristics, as we
	have fewer objects created
  - second, we move from “a ^ 2” to “a * a” as the latter has a much
	simpler implementation and thus a higher performance

Since the ‘square’ function is obsoleted by the above the patch also
removes it.

This big patch cleans up the code per hlint indications. Many removals
of extra parentheses, replacements of concat . map with concabtMap,
extra dollar signs, eta reductions, etc. were performed.

The code still compiles and passes a couple of manual tests on sample
files. The individual changes are also small enough as to be visually
easy to confirm.

This removes some unused functions and imports to cleanup the warnings.

In a few places (e.g. tryRead or any printf call) it's a little bit hard
to add the correct type signatures, but in the it is possible to fix
these warnings (which can bite one in subtle cases).

This doc-patch adds copyright and license information to (hopefully) all
needed files.

Also replace a type with its synonim.

This patch does only doc build changes, doc changes and function move
around (for more logical documentation). It should have no impact at all
on the code.

This new big patch does a couple of more cleanups in the loading of data
chapter:
  - introduce a Types module that holds most types (except the base
    Node/Instance/etc.) so that multiple other modules can use these
    (instead of only Cluster and its users)
  - bring IAlloc.hs in line with the recent changes of providing data
    types and not strings
  - removal of obsolete Utils.hs json-related functions

This makes hail compile and get a request parsed via IAlloc, but nothing
more.

We don't really needed, but is more clean like this.

This big patch converts from our home-grown monad-like constructs
(the Either stuff) to a real, Either-like-but-another-name monad.

We introduce a “Result a” monad, and this allows dropping many of the
extra constructs. Hopefully the code is also more clear.

Many of the functions could now be written in a generic-monad style,
instead of Result specifically, but that will come in future patches.

IAlloc.hs also has some unrelated patches.

This patch drops compatiblity with Ganeti 1.2 and adds support for
offline nodes in the cluster. When reading from RAPI, the drained nodes
are considered offline so that we don't allocate on them too.

We know have a working parseData function that returns the node and
instance data. This uncovered bad support for non-drbd instances ☹

This patch moves the generic/reusable JSON functions to Utils.hs, so
that they're shared between RAPI/IAlloc.

Since it's easy to pass a wrong node name as offline, we should abort
instead of silently ignoring it.

This patch moves the common CLI functionality (as much as currently
possible) into a separate module. This means we only have one parseOpts
and that Utils.hs doesn't keep this kind of functions anymore.

The modules are moved from the ‘top’ namespace to ‘Ganeti.HTools’, in
compliance with standard practices.

This patch moves the version string creation into a function in Utils
which shows some more information.

This patch moves a function to Utils and changes hn1 to be able to take
data from RAPI.

This is the initial import of release 0.0.3.