Fix R15 compatibility

* Define ErlDrvSizeT for pre-R15 systems
* Update syslogdrv_output to use ErlDrvSizeT
* Add missing driver entries that are now required
Merge pull request #2 from andrewtj/atj-r15compat

Fix R15 compatibility
Add log timeout

The default (5000) timeout of gen_server was not enough
Maybe due to network or port driver issues
I'd like to specify higher timeout value
Fix double-free on bad 'open', fixes issue #3
Merge pull request #4 from tcseke/log-timeout

Add log timeout
indentation overhaul
revise driver to use port_control, and add close/1

Use port_control and port_call instead of just port_command to communicate
with the port driver. The port_control and port_call functions include a
command integer argument that makes it easy to send specific commands to
the driver, rather than encoding the commands as atoms in external
format. They also allow for the easy return of simple terms in their
preallocated return buffers. They also allow simple constants to be
returned from the driver for badarg and other general errors. The log
function still uses port_command, but sends an iolist for priority and
message data rather than encoding to external format.

Change open to return a new port, and change the log functions to take the
log port returned from open as its first argument.

Add a new variant of the log function that takes a format string and a list
of format arguments. Drop the timeout argument to log, since it no longer
is meaningful.

Add a close/1 function to close the log.

Modify the determination of the path to the driver shared library, making
it match idiomatic code used for NIFs and drivers in other components.

Add checking of the return values from the ei encoding and decoding
functions in the driver code.

Use driver_alloc and driver_free in the driver code rather than malloc and
free. Also add checks for memory allocation failures.

Use static initialization for the ErlDrvEntry struct. Remove the creation
of driver atom constants that were no longer used.

Add a test to verify that logging on a log that's already been closed
returns an error.
Update docs, bump version to 1.0.0
Merge branch 'vinoski-sv-driver-tweaks'
Fix compile error on GCC

Error was: 

c_src/syslog_drv.c:92: error: 'int32_t' undeclared (first use in this function)

on

cc (GCC) 4.2.1 20070831 patched [FreeBSD]
Use uint32_t instead of int32_t
Merge pull request #6 from hukl/master

Fixed a compiler error on FreeBSD and corrected wrong integer type
Roll version 1.0.1
move port creation to Erlang to fix issue #9

With R16B changes related to locking within the area of port drivers seemed
to result in the syslog driver hanging on the driver_create_port call. To
avoid this, move port creation and closing from C into Erlang. Rework the
driver control interface to simplify the open call to just the setting of
the logopt and facility on a new port. Remove the opening and closing of a
port in the gen_server init and terminate as that port is no longer needed
to communicate with the driver. Move the open call out of the gen_server
and do it in the caller's process instead.
Merge pull request #11 from vinoski/sbv-r16

move port creation to Erlang to fix issue #9
Roll version 1.0.2