alpha.v7

Seventh alpha release!

Main changes:

• add a builtin emulator on the webpage! (#83)
• add vision 1-5! (#90)
• add new tool: eyedropper (#85)
• add shortcut to switch between tools by keyboard (#86)

Minor changes:

• add Yarn's Workspace (#83)
• rename webpage to klo-gba.js (#88)
• show id of object and tile in hex on MapFooter (#88)
• refac to remove the end address for tilemaps (#89)
• fix some css warnings (#88)