Add standalone featrue
Merge pull request #1 from afc163/standalone

Add standalone featrue
update hist
bump 0.2.0
test for standalone argument
fix testcase
move options to spm-build
update hist
bump 0.2.1
transportId instead of generateId

will not check file whether is exist
update hist
bump 0.2.2
concat give the originPath using first File
improve getSelf that will return css package
update hist
bump 0.3.0
not cancat ignore package when include all, fix spmjs/spm#814
bump 0.3.1