Merge pull request #194 from bmeurant/master

fix bonecp version, its default configuration values and add Google Guava dependency
Exclude slf4j dependency from bonecp-spring in order to avoid conflict with RESThub one
Merge pull request #195 from sdeleuze/master

Exclude slf4j dependency
[maven-release-plugin] prepare release resthub-spring-stack-2.1.1
[maven-release-plugin] prepare for next development iteration
Allow to specify charset in HTTP client
Merge pull request #198 from sdeleuze/master

Allow to specify charset in HTTP client
Fix issue #200 : Http Client error when using POST/PUT with special character
Merge pull request #201 from sdeleuze/master

Fix issue #200 : Http Client error when using POST/PUT with special character
Fix issue #199 (Bug with asynchttpclient using SSL with proxies) by upgrading to async-http-client 1.7.18
Merge pull request #203 from sdeleuze/master

Fix issue #199 (Bug with asynchttpclient using SSL with proxies) by upgrading to async-http-client 1.7.18
Update dependencies
Merge pull request #204 from sdeleuze/master

Update dependencies