Tests update

Zombie removed
Legacy tests removed
Tests fixes
Merge pull request #15 from Hexlet/feature/23-tests

Tests update
Copying bower files before testing
build assets by request
Merge pull request #17 from Hexlet/feature/build-assets-by-request

build assets by request
Merge pull request #16 from Hexlet/fix/travis-launching

Copying bower files before testing
replace termjs by xtermjs
update xterm
implement fullscreen mode
resize terminal on contaner dimension changed
some improvements