Reworked "find" to allow for more sophisticated searches.

The usage of the "find" command is as follows:
	find SEARCH
where SEARCH is either a simple string to search for, or key:value pairs
with the following keys:
	artist
	album
	title

1 files changed, 2 insertions, 1 deletions

diff --git a/music.h b/music.h
index ed47657..f7d06bd 100644
--- a/music.h
+++ b/music.h
@@ -43,7 +43,8 @@ namespace music {
 	MusicListing::p get(const HTTP::Connection::PathList& path);
 	MusicListing::p get(const std::string& path);
 	MusicDirectory::p get_directory(const std::string& path);
-	std::vector<MusicListing::p> find_artist(const std::string artist);
+	std::vector<MusicListing::p> find(const std::map<std::string, std::string> search);
+	std::vector<MusicListing::p> find(std::string search);
 	void begin_update(const std::string path);
 	void update(const MusicDirectory& dir);
 };