hCore - HYaml fixes

• Fixed some problems in HYaml.

hCore - Database changes

• Added new methods to database.
• Added annotations to database methods.

hCore - Database changes

• Changed database system.
• Removed Database class.
• Added DatabaseProvider system.

hCore - HYaml

• Added HYaml class for create and manage yamls easily.

hCore - HItemStack

• Added HItemStack class for creating item stack easily instead of ItemStack class.
• Fixed some HItemStack problems.

hCore - JavaDocs

• Added javadoc plugin to pom.
• Fixed worldborder problems.

hCore - First release

• Published first file.