Updated parsers to use latest from ShEx page.
Note that other functionality in the validator is broken by this change.
Update ChEMBL example to latest ShEx.
Removed unnessary BASE declaration
Updated top level to Summary
Commented out problematic entries
Updated SummaryLevelShape to latest version of text
Updated VersionLevelShape to latest document specification
Updated DistributionLevel Shape to latest document
Merge branch 'master' of https://github.com/AlasdairGray/HCLSValidator
Merged in Eric's latest changes for parsing ShExes but this has messed up the formatting of the page
Fixed error in ChEMBL example
Removed annoying message about no schema