add new test case which prroves the problem
Merge branch '1.4.x' into issue480
use patch provided by digulla
add dependency required to use BuildContext for detecting incremental build changes
update env.js library to latest version
update env.js library to latest version
When the last line in css does not end with ;, eg. none, CSSMin replaced this with non;
CSSMin did not remove empty selector
Merge pull request #66 from kantega/semicolonerror

Semicolonerror
remove redundant test
Merge branch 'issue551' into 1.4.x
update travis script to install artifacts (not only test it)
Merge branch 'travis' into 1.4.x
add new test case which proves that btoa() function is applied
Merge branch 'issue537' into 1.4.x
use minimized version of env.js
Merge branch 'minimizeEnvJs' into 1.4.x
update google closure dependency version
Merge branch 'issue553' into 1.4.x
get latest changes from 1.4.x