Update README.md
Doc updated
Update .travis.yml
Update .travis.yml
Merge branch 'fromYukki-master'
added a few more tests for if-tag; go fmt.
Merge branch 'master' of github.com:flosch/pongo2
Introducing 2 new API functions: ReplaceTag/ReplaceFilter; fixes #29
Merge pull request #1 from flosch/master

Merge with flosch/pongo2