moved everything into /trunk/ to create the standard svn layout, for use with tools that require this (eg. git-svn). IMPORTANT: do NOT do an `svn up`. instead, re-use your working copy's existing files with `svn switch` (http://svnbook.red-bean.com/en/1.6/svn.ref.svn.c.switch.html).

bugfix: schemas/.htaccess: corrected $innermost_dir

added .htaccess files for inputs/, schemas/ because these reside outside the DOCUMENT_ROOT, and therefore need an explicit RewriteBase directive so that RewriteRules in their subdirs can construct self-referential URLs. this ensures that the input URLs to RewriteRules are always URL paths instead of filesystem paths, which tend to mess up the redirects. (mod_rewrite is capable of doing filesystem-only redirects, but the associated RewriteRules require special care to ensure they match and reconstruct the filesystem path properly.) the presence of filesystem paths in RewriteRule inputs had been causing numerous bugs, especially in rules that use %{REQUEST_URI}, and the addition of the RewriteBases will hopefully avoid these types of bugs in the future. note that every path that resides outside the DOCUMENT_ROOT needs an explicit RewriteBase in its top-level .htaccess.