Fix some unicode issues in caching sub-system of spider module
Fix some unicode issues in caching sub-system of spider module

SpaceAppsXploration/grab,codevlabs/grab,huiyi1990/grab,huiyi1990/grab,pombredanne/grab-1,alihalabyah/grab,SpaceAppsXploration/grab,istinspring/grab,DDShadoww/grab,shaunstanislaus/grab,raybuhr/grab,giserh/grab,kevinlondon/grab,DDShadoww/grab,lorien/grab,liorvh/grab,subeax/grab,codevlabs/grab,istinspring/grab,maurobaraldi/grab,subeax/grab,alihalabyah/grab,giserh/grab,maurobaraldi/grab,pombredanne/grab-1,shaunstanislaus/grab,kevinlondon/grab,raybuhr/grab,liorvh/grab,lorien/grab,subeax/grab