Added spans that will show "First Page", "Previous Page", "Next Page",
"Last Page" when its unavailable. Eg. the user is on the last page so
there should be no link to click and instead just place holder text.
The css uses flexbox display and thus only works in modern
browsers (see: http://caniuse.com/#feat=flexbox). This may be changed in
the future as to support more browsers (IE9+ specifically).
Images/Icons for "First Page", "Previous Page", "Next Page", "Last Page"
have yet to be set (though would preferably be done in pure CSS).
Signed-off-by: Collin J. Doering <collin.doering@rekahsoft.ca>
Collin J. Doering