Add support for latexing array quantities
Made _format_exponential_notation into a public static method
Switched LaTeXification to use format_exponential_notation
Switch to a single branch for scalar and array in LaTeXification
Make scalar latexification work and other cleanup
update repr_latex tests
Fix scalar formatting in LaTeX
Get better infinity/NaN behavior
Added changelog entry
move formatter keyword to array2string

numpy 1.6's set_printoptions does not support formatter
remove unneeded comment
Switch to using a configuration item for setting the numpy threshold
switch to view instead of np.array as suggested by @mhvk
raise error for numpy <1.7 with array quantity latexing

it seems that formatter is not available *at all* in numpy 1.6
update tests to work on numpy 1.6
Use class methods in formatters for format_exponential_notation
shorten-up description via line break

[ci skip]
Merge pull request #2271 from eteq/quantity-repr-latex

Add support for latexing array quantities