Update oss-projects.yml

Android Rivers is probably the most complete Android OSS app developed in Kotlin.
fixed typo
excess header
Update link to kotlin-vim to the up-to-date version
Merge pull request #27 from dodyg/patch-1

Update oss-projects.yml
Merge pull request #28 from yorlov/patch-1

fixed typo
Merge pull request #29 from yorlov/patch-2

excess header
Merge pull request #30 from JetBrains/udalov

Update link to kotlin-vim to the up-to-date version
Added link to site.
Fixed spacing on lang def
Minor fixes on using-gradle page

-change pom file to build.gradle
-fix anchor to configuring snapshot versions
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