build dsp files from zul, zkex and zkmax project
delete dsp files
generate style based on LESS defined in zul, zkex and zkmax project
delete DSP files that will generate during build process
only need variable less files to build theme
no need import less files
Merge pull request #14 from VincentJian/sapphire-less

Sapphire less
Merge pull request #13 from VincentJian/silvertail-less

Silvertail less
add comments for LESS variables