use #000000 as default on invalid color
allow opts.format to be passed in
dont convert alpha to percentage
handle transparent as a name, rather than an rgb
rename gruntfile
update gitignore
gruntfile updates
add failing test to account for toString() and alpha values. https://github.com/bgrins/spectrum/issues/92
Add tests and allow intentional passing of 0 to modification functions. Issue #19.
Merge branch 'master' into gh-pages