Renames CLI options for future extensibility.

* Introduces a breaking change with 0.9
* `-a, --assethosts` becomes `--css-asset-hosts`
* `-b, --cacheboosters` becomes `-b, --cache-boosters`
* `--bj, --js-bundled` becomes `--js-bundle-to`
* `--bs, --styles-bundled` becomes `--css-bundle-to`
* `-i, --indent` becomes `--js-indent`
* `-l, --line-break-at` becomes `--js-line-break-at`
* `-n, --noembedversion` becomes `--css-safe-embed`
* `--nm, --nominifyjs` becomes `--js-no-minify`
* `--pj, --js-path` becomes `--js-source`
* `--ps, --styles-path` becomes `--css-source`
Ensures EnhanceCSS' pregzip option is taken from --gzip switch.