HTML perfect completion

HTML perfect completion should work mainly in 3 stages:

1.tag completion (realized in Sublime Text 2);

2.attribute name completion (realized in Sublime Text 3, not tested yet);

3.attribute value completion.

Tag completion must be followed by attribute name completion (not all the attributes, but only the specific attributes for a specific tag).

Attribute name completion must be followed by attribute value completion (not all the values, but only the specific values for a specific tag), with cursor placed between quotation marks "|".