Added console command support to the bootstrap app.

Usage of "escapeshellarg" has been added to "yii\console\controllers\AssetController::actionCompress()".

 Method "yii\console\controllers\AssetController::buildTarget()" has been fixed to compose input file name correctly.

- better throw http exception on not satisfiable range request
- constitent header names
- fixed range end when range request is to the end
- added unit test

related to #275, fixes #148

class name is alwarys HttpException, better display the name of the http
error.