Add gitignore in server dir.
Remove unnecessary write file in upload.py
Merge pull request #64 from haosdent/3.0

Add gitignore to server dir
add adsl proxy support for goagent.exe
bugfix for adsl
refine uploader
Update README.md
Fix file permissions.

* Set the execute bit for python frontend.
* Unset unnecessary execute bit for other files.

Then we can run goagent with `./proxy.py` for short (compared to `python
proxy.py`.
Merge pull request #65 from pallxk/3.0

Fix file permissions.