0.11.0 Onboarding documentation update and minor API changes

What's Changed

• Added the parent name in the flatten operation by @zaleslaw in #378
• Added required lowercase conversion for all the columns by @zaleslaw in #379
• Reworked of dfs functions to recursively (changing a return type of recurseable functions) by @Jolanrensen in #363
• Added release flag priority when choosing the version number by @koperagen in #382
• Added nullability support for the describe() by @zaleslaw in #384
• Added RELEASE_CHECK_LIST.md by @zaleslaw in #385
• Added some name repairing strategies by @zaleslaw in #386
• Added a link to the missed dataset titanic.csv by @zaleslaw in #389
• Fixed the link to the movie.csv by @zaleslaw in #390
• Extracted subchapters by @zaleslaw in #391
• Added a section about JDK and libraries versions to Readme.md by @zaleslaw in #392
• Fix missing articles and grammar in docs by @Jolanrensen in #398
• Split the Gradle and Kotlin build snippets for Android and Server-side by @zaleslaw in #400
• Added verification for Google search index by @Jolanrensen in #409
• Rewritten gettingStarted page by @zaleslaw in #407
• Updated diff function #339 by @koperagen in #410
• Added NA and NaN docs by @Jolanrensen in #411
• Fixed withValue() -> with { value } by @Jolanrensen in #403
• Fixed: Jupyter compile-time DF type not recognized by @Jolanrensen in #401
• Added row functions to "operation overview" to make it comprehensive by @koperagen in #412

Full Changelog: build-0.10.1...build-0.11.0