Add checkout test suite.

Removed 'bare' option from test repository to 
allow checkout tests.

tests-clar/checkout/checkout.c

+#include "clar_libgit2.h"
+
+#include "git2/checkout.h"
+#include "repository.h"
+
+#define DO_LOCAL_TEST 0
+#define DO_LIVE_NETWORK_TESTS 1
+#define LIVE_REPO_URL "http://github.com/libgit2/node-gitteh"
+
+
+static git_repository *g_repo;
+
+void test_checkout_checkout__initialize(void)
+{
+	g_repo = cl_git_sandbox_init("testrepo");
+}
+
+void test_checkout_checkout__cleanup(void)
+{
+	cl_git_sandbox_cleanup();
+}
+
+
+static void test_file_contents(const char *path, const char *expectedcontents)
+{
+	int fd;
+	char buffer[1024] = {0};
+	fd = p_open(path, O_RDONLY);
+	cl_assert(fd);
+	cl_assert_equal_i(p_read(fd, buffer, 1024), strlen(expectedcontents));
+	cl_assert_equal_s(expectedcontents, buffer);
+	cl_git_pass(p_close(fd));
+}
+
+
+void test_checkout_checkout__bare(void)
+{
+	cl_git_sandbox_cleanup();
+	g_repo = cl_git_sandbox_init("testrepo.git");
+	cl_git_fail(git_checkout_force(g_repo, NULL));
+}
+
+void test_checkout_checkout__default(void)
+{
+	cl_git_pass(git_checkout_force(g_repo, NULL));
+	test_file_contents("./testrepo/README", "hey there\n");
+	test_file_contents("./testrepo/branch_file.txt", "hi\nbye!\n");
+	test_file_contents("./testrepo/new.txt", "my new file\n");
+}
+
+
+void test_checkout_checkout__crlf(void)
+{
+	const char *attributes =
+		"branch_file.txt text eol=crlf\n"
+		"README text eol=cr\n"
+		"new.txt text eol=lf\n";
+	cl_git_mkfile("./testrepo/.gitattributes", attributes);
+	cl_git_pass(git_checkout_force(g_repo, NULL));
+	test_file_contents("./testrepo/README", "hey there\n");
+	test_file_contents("./testrepo/new.txt", "my new file\n");
+	test_file_contents("./testrepo/branch_file.txt", "hi\r\nbye!\r\n");
+}
+
+void test_checkout_checkout__stats(void)
+{
+	/* TODO */
+}

tests-clar/resources/testrepo/.gitted/config

 [core]
         repositoryformatversion = 0
         filemode = true
-        bare = true
+        bare = false
         logallrefupdates = true
 [remote "test"]
 	url = git://github.com/libgit2/libgit2