Added a README.md and improved some docs. Added TravicCI integration

README.md

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+#[Boost.Conversion](http://boost.org/libs/conversion)
+Boost.Conversion is one of the [Boost C++ Libraries](http://github.com/boostorg). This library improves program safety and clarity by performing otherwise messy conversions. 
+
+### Test results
+
+@               | Build         | Tests coverage | More info
+----------------|-------------- | -------------- |-----------
+Develop branch: | [![Build Status](https://travis-ci.org/apolukhin/conversion.svg?branch=develop)](https://travis-ci.org/apolukhin/conversion)  | [![Coverage Status](https://coveralls.io/repos/apolukhin/conversion/badge.png?branch=develop)](https://coveralls.io/r/apolukhin/conversion?branch=develop) | [details...](http://www.boost.org/development/tests/develop/developer/conversion.html)
+Master branch:  | [![Build Status](https://travis-ci.org/apolukhin/conversion.svg?branch=master)](https://travis-ci.org/apolukhin/conversion)  | [![Coverage Status](https://coveralls.io/repos/apolukhin/conversion/badge.png?branch=master)](https://coveralls.io/r/apolukhin/conversion?branch=master) | [details...](http://www.boost.org/development/tests/master/developer/conversion.html)
+
+
+[Open Issues](https://svn.boost.org/trac/boost/query?status=!closed&component=conversion&or&status=!closed&component=lexical_cast)
+
+### License
+
+Distributed under the [Boost Software License, Version 1.0](http://boost.org/LICENSE_1_0.txt).