fixed bug in List_helper and add test for object combinations

new tests for cominations of object folowing eachother
TestPostListListBlob
TestPostCommitBlob
TestPostTagBlob
TestPostTagCommitBlob
TestPostTagTagBlob
TestPostListCommitBlob
TestPostTagListBlob
TestPostListTagBloB

removed old less covering TestPost

added String Method to HKID and HCID inoder to have better log messages
updated log messages to take adfantige of HIDs being sreingers

fixed bug in list_helper() where list folowed by list was typed as blob

removed old implimentation of post now that the new one passes tests