Added description to the page action=w2llatexform.
[w2llatexform]Title of the page modified.
[w2llatexform]Added help message.
[w2lonPdf]Page formatting
[w2llatexform][w2lonpdf] Added description to the pages that the user sees when he wants the pdf.
New messages have been added: w2l_result_text, w2l_export_help_text, w2l_export_after_status.
Some of these have html code inside and links to pages on wikifm.org.
Minor changes, corrections and file removal
Merge pull request #8 from alvarin32/master

Modifies to the export pages