Fix the RPC interface

* Fix the SQL query to conform to the new database layout.

* Remove the license field from replies. The license field is now stored
  in a separate table and no longer returned on search queries.

* Add a "PackageBase" field that contains the name of the package base
  of every package in the result.

* Fix the source tarball URL. The URL is now built based on the package
  base name instead of the package name.

Signed-off-by: Lukas Fleischer <archlinux@cryptocrack.de>
Add more fields to RPC info replies

This patch adds the following fields to info and multiinfo replies:

* Depends
* MakeDepends
* CheckDepends
* OptDepends
* Conflicts
* Provides
* Replaces
* Groups
* License

Each of these fields is an array.

Note that since collecting all these fields is CPU-intensive, they are
not included in replies to search queries.

Signed-off-by: Lukas Fleischer <archlinux@cryptocrack.de>
Add a version tag to RPC replies

This is needed for clients to quickly differentiate between different
versions of the RPC API. The version number should be bumped whenever
there is a change that breaks backwards compatibility.

Signed-off-by: Lukas Fleischer <archlinux@cryptocrack.de>
aurjson.class.php: Style fixes

* Fix braces, indentation and comment style.
* Remove some superfluous comments.
* Reword some comments.

Signed-off-by: Lukas Fleischer <archlinux@cryptocrack.de>
Support versioned RPC queries

This adds a backwards compatibility mode for the old RPC API. The old
format can be requested by explicitly adding "v=1" to the list of GET
parameters. Note that due to internal changes, the old format only
returns the first license that belongs to a package.

Signed-off-by: Lukas Fleischer <archlinux@cryptocrack.de>
Use RPC API version 1 by default

Most AUR helpers don't support the new format yet. Use version 1 of the
API by default. In order to use the new format, "v=2" can be appended to
the list of GET parameters.

Signed-off-by: Lukas Fleischer <archlinux@cryptocrack.de>