refs #4843 Added option to read log file

There is now a tickbox in the C2E GUI which allows users to select whether or not to simultaneously load the log file associated with the raw file they wish to load.
refs #4843 Changes from the develop branch

Code on develop branch was more up-to-date. This prevents merge conflict and also includes changes which gives users to load logs.
refs #4843 Merge branch 'feature/4843_load_logs' into develop

Conflicts:
	Code/Mantid/scripts/Inelastic/inelastic_indirect_reduction_steps.py