Add 'include' / 'exclude' filters to [tagcloud] shortcode [LACE]

[nfreear]

Current crude CSS:

@IET-OU/wp-iet-generic-plugins ../css/iet-custom-style.css ~ line 193-195:

.lace-remove-ev-tags .iet-wp-tag-cloud-plugin a[ href *= 'tag/ev-' ] {
    display: none;
}

Current examples:

• http://iet-lace-approval.open.ac.uk/tests-and-demos/tag-cloud-test/

[tagcloud format="list" x_display_count="after"]

Possible extensions

Include tag/ev-* tags:

[tagcloud x_include="tag/ev-"] `

Exclude tag/ev-* tags:

[tagcloud x_exclude="tag/ev-"]