Improve dealing with exceptions

re #6175
Compiler error stringstream not on the scope

re #6175
Using test related to current directory

re #6175
Probably solve the issue with Jenkins has no homedrive

re #6175
Remove one Path::home of ScriptRepositoryImpl

re #6175
Move ScriptRepositoryParser to mantid/scripts project

re #6175
Recognise deleting file from local or central repository

re #6175