Update readme.txt

Adding suggested submission directory structure; adding suggested commentary and documentation naming convention; adding email addresses; adding GitHub address;
Delete readmeWeb.txt

Merging back with main Readme file;
Delete readmeMiddle.txt

Merging back with main Readme file;
Delete readmeDatabase.txt

Merging back with main Readme file;
Update ReferenceData.pm

Updating error checking; modifying to take account of database change;
Update UpdateReferenceData.pl
Update GenBankData.pm

Updating error checking; reworking filter translation in GetSummaryData;
Update GenBankAnalysis.pm

Updating error checking;
Update ReferenceData.pm

Correcting formatting;
Merge pull request #8 from gindevonshire/master

Updating readme file and middle layer error checking