Changes for package cubature

Version 1.0 (2009-12-18)
  - Original version of package based on Steven G. Johnson's cubature
	routines at http://ab-initio.mit.edu/wiki/index.php/Cubature

Version 1.1 (2011-11-10)
  Changes from previous versions
  - Synced up to SGJ cubature routines dated 2010-10-18 on his website
	http://ab-initio.mit.edu/wiki/index.php/Cubature
  - Bugfix: potential memory leak fixed up in heap routine (my oversight!)
  - Routine adaptIntegrate gains ... argument (request of Baptiste Auguie)
  - Corrected radius constant in testFn2 to match cubature output exactly

Version 1.1-1 (2011-12-01)
	- Added doChecking argument (default FALSE) to save some
	        computation time in evaluating integrand (9% speedup).

Version 1.1-2 (2011-12-08)
	- Fixed typo in doc for function adaptIntegrate; default value for
		doChecking was incorrectly stated as TRUE

Version 1.1-2 (2013-02-24)
        - Registered native cubature functions adapt_integrate and
        	adapt_integrate_v so that they are directly callable from C
		(courtesy of Simen Gaure)
Version 1.1-3 (2015-07-15)
        - Roxygenized in preparation for upgrade to newer version of
	cubature library on abinitio website

Version 1.2-0 (2016-11-20)
        - Moved to Rcpp framework
	- Added tests in preparation for SGJ cubature-1.0.2 version

Version 1.3-0 (2016-11-30)
        - Moved to SGJ cubature-1.0.2 version.
	- adaptIntegrate and hcubature are aliases
	- hcubature function gains a norm argument that is set to a
	  sensible default so as not to affect depending packages

Version 1.3-1 (2016-12-05)
        - Added pcubature
	- Added vector versions

Version 1.3-2 (2016-12-05)
        - Added vignette showing huge gains due to vectorization

Version 1.3-3 (2016-12-09)
        - Moved the cubature-1.0.2 C library to github to avoid
	hitting the CRAN size limit.

Version 1.3-4 up (2016-12-11)
	- Generated smaller pcubature header (clencurt.h) using
	M = 16 and put back C cubature source in tree.

Version 1.3-7 (2017-05-09)
	- Registered .Call stuff and removed microbenchmark suggestion in
	favor of benchr.

Version 1.3-8 through 1.3-11 (2017-07-17)
	- Merged Manuel Koller's registration for C code and vignette fix
	for NA.
	- Moved cubature header and exp_cubature headers to inst/include
	for linking to other packages
	- Renamed Readme.md to README.md
	- Removed references to ab-initio website that caused some hassle
	due to misconfigured site.

