remove things from packing that I commited

remove md5 file
remove description package info
Add option sge.save.dir

Adds the option "sge.save.dir" - the directory
where to save all inputs/outputs
(including the *.o, *.e files generated by sge),
when NULL it will use the current working directory
This was added in order to use a specific location
of network file-system.

(this patch was originally submitted by
Gal GoldShtein and Alon Wasserman)
Add sources list to each job

this commit adds a list of files that can be
sourced by each job to set up their environemnts

(this patch was originally submitted by
Gal GoldShtein and Alon Wasserman)
Clean up all files on failure

This commit ensures that all files are cleaned up
on failure.

(this patch was originally submitted by
Gal GoldShtein and Alon Wasserman)
allow more detailed view of jobs

Added more trace logs about the status of the sge
execution. This now includes the output of the
'qsub' command (under the trace debug level).
We now use a new function, sge.system.tee, that
prints the output from a command and also returns
it. Here's a word of explanation for why we made
this change (instead of using the 'system'
function). In our setting, we set the sge.qsub
option to '/usr/share/doc/expect-dev/examples/unbuffer qsub'.
This "unbuffer" script, available in Ubuntu/debian
linux in the expect-dev package allows you to run
qsub in an unbuffered way, so that we can monitor
the completion and return status of the different
jobs as they complete. Of course, everything works
fine if you keep sge.qsub as 'qsub'.

(this patch was originally submitted by
Gal GoldShtein and Alon Wasserman)
switch First.lib to .onLoad
print hostname of nodes where jobs run
Changed calls to .path.package to use public function path.package
(introduced in R 2.13.0, which is now required)
added new maintainer info and cleaned up DESCRIPTION file
cleaned up Rd files so R CMD check won't complain
moved start-up message to .onAttach and use `packageStartupMessage` to
display it
tweaked export directive to ensure that .onLoad and .onAttach are not
exported
changed value of 'sge.use.cluster' from character to logical
fixed formatting
don't show startup messages for packages loaded on slaves
don't use snow's `docall`
bumped version number
Merge pull request #1 from humburg/pending_changes

Pending changes