Merge pull request #3 from syscoin/master

fetch official
consistent rescan, fix help for -txindex defaulting true
prevent infiniloop while reconstructing aliases
this fixes -rescan (previously: hungup)
this bug was introduced in https://github.com/syscoin/syscoin/commit/65228986711dddf288d15ed05b2d7b2d46e66998#diff-cfe9e5456ba40db0f1c7f4fdd72ff393
pull rpc error handling for importprivkey from litecoin
https://github.com/litecoin-project/litecoin/commit/dab55190ece3770d2cb6336a29d7308d1ab2e917
https://github.com/litecoin-project/litecoin/commit/7e1d5ca8944ec6b129244206860c39454dd03ec0
stub patch clarifying required changes for new rpc parameters
Merge pull request #113 from hgt5/master

fix -rescan, fix -txindex help, enable actually rescanning for certissuers, remove memleak, some hints