fixed display if there is no price given
probably fixed a bug where subscription public ids were always the same
don't synchronize products that are marked as not synchable
#21
some more logging
[skip ci]
adjusted import
[skip ci]
corrected delay call of ProductSynchronizeTask #10
added asin to multiple subscription exception logging
fixed verbose name for part number
updated travis build status images
merged current master into branch angular-frontend