Install man page and add man version.

man/CMakeLists.txt

diff --git a/man/CMakeLists.txt b/man/CMakeLists.txt
index d4afb0e..e285a3d 100644
--- a/man/CMakeLists.txt
+++ b/man/CMakeLists.txt
@@ -16,6 +16,7 @@
   zip_error_set.mdoc
   zip_error_strerror.mdoc
   zip_error_system_type.mdoc
+  zip_error_to_data.mdoc
   zip_error_to_str.mdoc
   zip_errors.mdoc
   zip_fclose.mdoc

man/Makefile.am

diff --git a/man/Makefile.am b/man/Makefile.am
index c2ced0f..b0f5ca3 100644
--- a/man/Makefile.am
+++ b/man/Makefile.am
@@ -23,6 +23,7 @@
 	zip_error_set.mdoc \
 	zip_error_strerror.mdoc \
 	zip_error_system_type.mdoc \
+	zip_error_to_data.mdoc \
 	zip_error_to_str.mdoc \
 	zip_errors.mdoc \
 	zip_fclose.mdoc \

man/zip_error_to_data.man

diff --git a/man/zip_error_to_data.man b/man/zip_error_to_data.man
new file mode 100644
index 0000000..b90a49c
--- /dev/null
+++ b/man/zip_error_to_data.man
@@ -0,0 +1,38 @@
+.TH "ZIP_ERROR_TO_DATA" "3" "November 2, 2014" "NiH" "Library Functions Manual"
+.nh
+.if n .ad l
+.SH "NAME"
+\fBzip_error_to_data\fR
+\- convert zip_error to return value suitable for ZIP_SOURCE_ERROR
+.SH "LIBRARY"
+libzip (-lzip)
+.SH "SYNOPSIS"
+\fB#include <zip.h>\fR
+.sp
+\fIzip_int64_t\fR
+.PD 0
+.HP 4n
+\fBzip_error_to_data\fR(\fIconst\ zip_error_t\ *ze\fR, \fIvoid\ *data\fR, \fIzip_uint64_t\ len\fR);
+.PD
+.SH "DESCRIPTION"
+\fBzip_error_to_data\fR()
+function converts the zip_error
+\fIze\fR
+into data suitable as return value for
+\fRZIP_SOURCE_ERROR\fR.
+The data is written into the buffer
+\fIdata\fR
+of size
+\fIlen\fR.
+If the buffer is not large enough to hold 2 ints, an error is
+returned.
+.SH "RETURN VALUES"
+\fBzip_error_to_data\fR()
+returns 2*(sizeof int) on success, and \-1 on error.
+.SH "SEE ALSO"
+libzip(3),
+zip_source_function(3)
+.SH "AUTHORS"
+Dieter Baron <\fIdillo@nih.at\fR>
+and
+Thomas Klausner <\fItk@giga.or.at\fR>