* pkgs: refactor needless quoting of homepage meta attribute
A lot of packages are needlessly quoting the homepage meta attribute
(about 1400, 22%), this commit refactors all of those instances.
* pkgs: Fixing some links that were wrongfully unquoted in the previous
commit
* Fixed some instances
Update the `chibi-scheme` (attribute `chibi`) package from version 0.7
to version 0.7.3.
The homepage listed for this package before this change,
<https://code.google.com/p/chibi-scheme/>, now redirects to
<https://github.com/ashinn/chibi-scheme>; this patch changes this
package to use this GitHub version of the software.
I have tested this change per nixpkgs manual section 10.1 ("Making
patches").
