Merge pull request #31 from NataliaUkhorskaya/master

Minor fixes on using-gradle page
Update koans.md
Update koans.md
Fixed syntax error
Reverted
Fixed syntax error in Name Reading example
Cosmetics
Merge remote-tracking branch 'origin/master'
Cosmetics
correct filename of kotlin compiler for JS / Win
Merge pull request #32 from christian-laakmann/patch-1

correct filename of kotlin compiler for JS / Win
Update type-safe-groovy-builders.md

Fix links to lambda an higher order functions
Merge pull request #33 from lucassouza1/patch-1

Update type-safe-groovy-builders.md
Added RxJava
Fix 4 apparently incorrect "this" usages in one section
Add hyperlinks and fix a typo
Merge pull request #34 from JetBrains/udalov

Minor improvements in Classes and Inheritance
Fix &gt;
Reversed order
Update basic-types.md

Fix typo