LoadLog - Use the alternate file stream to speed up searching for log files

[Nick Draper]

The alternate file stream contains a list of the log files for a raw file. This may be much quicker than searching the directory.

Look at the link below:

http://www.mantidproject.org/RAW_File#Alternate_Data_Streams

Note: This may not always be present, so the code must be defensive and fall back to the current directory search.

[Sofia Antony]

(In [3586]) re#930 -Alternate file stream is used to speed up log file search.

[Sofia Antony]

(In [3593]) re#930 -empty lines skipped when reading alternate data stream .

[Sofia Antony]

(In [3630]) re#930 -improved load raw speed for multi period data. Load log algorithm is executed for the first period and copied the log information to next periods. re#1064 -improved load project

[Sofia Antony]

(In [3632]) re#930 - fix for doxygen warnings

[Sofia Antony]

(In [3638]) re#930

[Anders Markvardsen]

Found that if log file names are available from alternative file stream and one of these log files are not present in the directory of the raw file, as is the case when reading the traw file HRP37125 from the Mantid directory in mantid\Test\Data, then none of the log files are read into Mantid. Change this so that Mantid will attempt to read in each file listed in the alternative file stream and ignore those that are not present and read in those that are present.

[Russell Taylor]

(In [3833]) Don't bail out if a particular log file can't be found, just go onto the next one. Re #930.

[Russell Taylor]

(In [3834]) Modify logging level. Re #930.

[Anders Markvardsen]

Tested and works

[Stuart Campbell]

This ticket has been transferred to github issue ​1778