Added distribution package for u2py

+ Compiled with py2exe.
Implemented context-based execution of requested command via Reader.pool based on gevent ThreadPool.

When there is no reader present in request, ReaderlessContext provides a way to execute such request in same thread without using thread pool.

+ Monkey patch in webapi.server required for web.py correctness.
Fixed Reader.apply method to support callbacks without arguments.
Reader detection procedure now utilizes Reader.apply to put close operation into reader own operation queue.
Unified exception handling for handlers_base
Version 1.5.14
Added py2exe setup script.
Added icon for u2py.
Moved distribution folder to dist.

+ Updated dist to version 1.5.14 compiled with py2exe
Final release of version 1.5.14.

+ Project structure slightly modified to enable py2exe compilation from
project folder.
+ Removed unused files.
+ u2.dll got FileImpl fixes and version information: 1.3.1.1
Merge branch 'master' of github.com:stdk/u2py

Conflicts:
	dist/config.py
	dist/python27.dll
	dist/service.exe
	dist/static/jquery-1.8.0.min.js
	dist/static/rewriter.ui
	dist/templates/index.html
	dist/u2.exe
	static/jquery-1.8.0.min.js
	static/rewriter.ui
	templates/index.html