some bugs

[terrytomas]

#public String post(HttpPost request, String postData) throws PostageAppException {
request.addHeader(new BasicHeader(HttpHeaders.CONTENT_TYPE, "application/json"));
request.addHeader(HttpHeaders.USER_AGENT, this.getUserAgent());

    HttpResponse postResponse;

    try {
    	
    	request.setEntity(new StringEntity(postData));
        postResponse = this.httpClient.execute(request);

        if (postResponse.getStatusLine().getStatusCode() / 100 != 2) {
            throw new PostageAppException("Unable to connect to PostageApp servers for API endpoint " + request.getURI().toString());
        }

        try {
            return IOUtils.toString(postResponse.getEntity().getContent());
        } catch (Exception e) {
            throw new PostageAppException(e.getMessage());
        }
    } catch (Exception e) {
        throw new PostageAppException(e.getMessage());
    } finally {
        if (httpClient != null) {
            request.releaseConnection();
            httpClient.getConnectionManager().closeExpiredConnections();
        }
    }
}