This fixes the problem with garbled characters in PDF metadata with LuaTeX.

Base color theme now draws gradients for all (not just dark) frames.

updated the `README`.

The `make all install-base` command can now be used to perform just
a base installation. Using the `make docs install-docs` command
afterwards will typeset and install the documentation as well.

The links within the index all pointed to the title page.

- Removed the useless uses of `use=` in the color themes of MU.
- Replaced `\setbeamertemplate` with `\defbeamertemplate*` in the inner
 theme of MU.
- Added mising `%`s.

Also updated the formatting of the technical documentation.

New logos added, prelim work on new unified style of MU finished.

`\fibeamer@backupLogo` macro and the new logo files.