Going back to 'org.questdb' group.

Update README.md

fix: minor typos

feat(griffin): new algo for 'sample by .. fill none' without key. It executes a little faster than generic algo.

GRIFFIN: avg() implementation to address #78

fix: remove read of array element via unsafe - it is a slower method compared to conventional array read.

CUTLASS: improved text file ingestion performance via making text parser a little more optimal and not doing utf8decode on dates and timestamps where its not needed.

CUTLASS: refactored json processor to support INSERT and removed 'switch' in favor of O(1) method reference lookup

Fix database protocol name to follow most dominant OSS RDBMS

New readme

GRIFFIN: refactored insert statement implementation and tested exhaustively

GRIFFIN: tidy-up toString() invocations. I will cache those strings that are column or table names rather than making new string all the time.
GRIFFIN: assigned table name to InsertStatement so that it can be self-sufficient at execution time. Added tests for no timestamp and all partition types.
CAIRO: performance-optimised ByteSequence returned by VirtualMemory