Favor core modules in search results

[cherifGsoul]

This adds prioritize can-core collection modules in search results.

Other collection modules needed special boost also, so a specific boost was added to other collections, like function, typedef or pages.

Closes #575

[chasenlehara]

You will probably need to bump this version number:

bit-docs-html-canjs/static/search.js

Line 7 in 9d23f8e

var currentIndexVersion = 5;// Bump this whenever the index code is changed

That version number is used here to reindex when the indexing code changes:

bit-docs-html-canjs/static/search.js

Lines 365 to 377 in 9d23f8e

	if (index && currentIndexVersion === indexVersion) {
	this.searchWorker.postMessage({
	name: 'load index',
	index: index
	});
	} else {
	this.searchWorker.postMessage({
	name: 'index data',
	index: index,
	items: this.convertSearchMapToIndexableItems(searchMap)
	});
	}

This commit has a little more info: 0d346e5