feat(select): Hugely simplify HTML select definitions

[edcarroll]

PR is WIP

This PR is aiming to address #134. It introduces a new way of defining a select, namely:

<sui-select [options]="[1,2,3]"></sui-select>

It is no longer required for you to have to write the *ngFor manually.

However, this doesn't eliminate the ability to specify more complex markup within the select. For example, adding a header to a select is done like so:

<sui-select [options]="[1,2,3]">
    <div class="header">
        <i class="tags icon"></i>
        Filter by tag
    </div>
</sui-select>

The results are rendered at the bottom.

However, if your markup is more complex still, you can manually specify the entry point for the options, like so:

<sui-select [options]="[1,2,3]">
    <div class="ui icon search input">
        <i class="search icon"></i>
        <input suiSelectSearch type="text" placeholder="Search options...">
    </div>
    <div class="divider"></div>
    <div class="header">
        <i class="list icon"></i>
        Options
    </div>
    <div class="scrolling menu">
        <sui-select-options></sui-select-options>
    </div>
</sui-select>

Finally, if you want to manually specify the options, you can still do so by simply putting:

<sui-select>
    <sui-select-option option="Option 1"></sui-select-option>
    <sui-select-option option="Option 2"></sui-select-option>
    <sui-select-option option="Option 3"></sui-select-option>
    <sui-select-option option="Option 4"></sui-select-option>
</sui-select>

Note that value has been renamed to option, as this makes it a bit more clear.

[edcarroll]

@trevordaniels this is a first attempt at what we discussed in #134. What are your thoughts on this way of doing things?

Unfortunately I haven't yet found a way to simplify the options template any further than currently, though I'm still investigating.

[curronieto]

I don't know if in this new version it's allowed to search on properties of embedded objects of options, like: labelField = "object.property" (in 0.9.6 is giving an error).

[jmls]

this would be useful - any chance of getting it merged ?