2016-03-24, v6.0.1, @miripiruni

Fix rendering mixes for namesake elems

Should support mixing namesake elements of different blocks

Example. Template:

block('b1').elem('elem')(
    mix()({ block: 'b2', elem: 'elem' })
);

v6.0.0 result (bug):

<div class="b1__elem"></div>

v6.0.1 result (fixed):

<div class="b1__elem b2__elem"></div>

[82374951eb] - Docs: Update 6-templates-context.md (Alexander Savin)
[63e49b26bc] - BEMHTML: fix rendering mixes for namesake elems (Alexey Yaroshevich)
[7eedcf83a4] - Bench: fix bem-xjst api (miripiruni)
[059ce55493] - Docs: Fix markdown (Slava Oliyanchuk)
[4ed98646c0] - Docs: changelog updated (miripiruni)