Issue with dropbox_get()

Hi there,

I have problem with dropbox_get function. I have connected to my dropbox and there is no problem using function dropbox_save, but when I want to download csv file, I get an error.

Could you help me with that? I would be very grateful!

``` r
library(rDrop)
drop_token<-dropbox_auth('key','secret_key',ssl.verifypeer=FALSE)

Use the Web browser to grant permission to this code
to access Dropbox on your behalf.
When you see 'Success!', hit enter in R
Dropbox authentication completed successfully.

exists.in.dropbox(drop_token,'kgh.csv',ssl.verifypeer=FALSE)
[1] TRUE

df2<-dropbox_get(drop_token,'kgh.csv',ssl.verifypeer=FALSE)

Error in function (type, msg, asError = TRUE) :
SSL certificate problem, verify that the CA cert is OK. Details:
error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed
```

**db.read.csv** do not work either...and I get this error:

``` r
Error in fromJSON(OAuthRequest(cred, "https://api.dropbox.com/1/search/dropbox/", :
error in evaluating the argument 'content' in selecting a method for function 'fromJSON': Error in function (type, msg, asError = TRUE) :
SSL certificate problem, verify that the CA cert is OK. Details:
error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed
```

I work on Windows 7 64 bit and here is my session.info.

``` r
R version 2.15.2 (2012-10-26)
Platform: x86_64-w64-mingw32/x64 (64-bit)

locale:
[1] LC_COLLATE=Polish_Poland.1250 LC_CTYPE=Polish_Poland.1250 LC_MONETARY=Polish_Poland.1250 LC_NUMERIC=C LC_TIME=Polish_Poland.1250

attached base packages:
[1] stats graphics grDevices utils datasets methods base

other attached packages:
[1] rDrop_0.3 stringr_0.6.2 colorspace_1.2-1 Rcpp_0.10.2 plyr_1.8 ROAuth_0.92.0 digest_0.6.2 RCurl_1.95-3 bitops_1.0-5 RJSONIO_1.0-1

loaded via a namespace (and not attached):
[1] tools_2.15.2
```

edit:
**dropbox_media** do not work either.