add aspk-period.js. Not finished.
add aspk-period.js. Not finished.

astropeak/aspk-code-base,astropeak/aspk-code-base,astropeak/aspk-code-base,astropeak/aspk-code-base,astropeak/aspk-code-base,astropeak/aspk-code-base,astropeak/aspk-code-base,astropeak/aspk-code-base,astropeak/aspk-code-base