Wording suggestions for current test version

[sefeg]

• The welcome message on the landing page should be changed to: Our mission is to preserve physics analyses to facilitate their future reuse.
  • Also add a link to the About page and the read-the-docs: Do you want to know more? About
• in the "project" box, if we keep the box. "Start preserving your analysis. Name it to distinguish it from the other drafts". Box then called: Preserve
• Rename "Choose a schema to start" to "Choose which analysis you would like to preserve"
• In the file uploader the following is written: '“Try” dropping some files here’ - remove “Try”
• In the about page, there are two spaces missing in the 2nd to last paragraph before the two links to the documentations
• Add "Analysis Identifier:" before the UUID on top of a preserved/deposited analysis

[suenjedt]

All done, Pamfilos will close with PR