Call AM_INIT_AUTOMAKE once only

Fixes build with automake-1.14
Add sqrt operator
Merge pull request #175 from lipidity/fix-build

Call AM_INIT_AUTOMAKE once only
Merge pull request #171 from joelittlejohn/fix-makefile

Fix Makefile after refactoring of stacks in 05d90517b02
Fix typo
Merge pull request #181 from mdaines/patch-1

Fix typo
Merge branch 'libjq'

Conflicts:
	Makefile.am
	configure.ac
Add test showing calculation of standard deviation
Merge pull request #182 from mdaines/sqrt-builtin

Add builtin for calculating square root
Add missing -i flag in build instructions
Merge pull request #185 from qoelet/master

Add missing -i flag in build instructions
Fix rpm build (`make rpm`)

* Remove NEWS and INSTALL from the spec as they no longer exist.
* Re-add VERSION as it's required for `./setup superclean`
  and `make rpm`.
* Add *.rpm to git ignore, we never want them under version control.