PDI-11393 - Build Number on Spoon is incorrect

Additionally the displaying date is changed according to 'MMMM d, yyyy hh:mm:ss' format
Merge pull request #573 from YuryBY/PDI-11393

PDI-11393 - Build Number on Spoon is incorrect
[PDI-12365] - moved "upgrade to enterprise edition"'s try enterprise edition button up to always be shown outside of the container + re-organized index.html file + added h3 styles to css
Merge pull request #577 from webdetails/PDI-12365

[PDI-12365] - moved "upgrade to enterprise edition"'s try enterprise edi...