Update readme for v0.4.0 tagging

Changes include:

• Fix for NonEmptyDomain, api was changed to use a vector of structs. #44
• Update for new consolidation api to be released with 1.5 #43
• Add VFS DirSize() #41

v0.3.0

Changes include:

• Key-Value store api
• Fixes for TILEDB_CHAR datatypes

TileDB-Go v0.2.0

Updates to TileDB-Go for core tiledb 1.4 compatibility. Changes include:

• Support for encrypted arrays
• Addition of filters (replaces compression)
• Removal of compression struct/enums
• Add Query.Buffer(attributeName string) (interface{}, error) for fetching an attribute buffer that has been set on a query
• Add Array.URI() to get the uri of an array object

TileDB-Go v0.1.0

This is the initial release of the TileDB-Go bindings. Support for the following apis is included:

• Array
• ArraySchema
• Attribute
• Config
• Context
• Dimension
• Domain
• Group
• Query
• Stats
• Version
• VFS