Initial Commit - Icons

Initial batch of icons that are in use or planned for use in the app.
Removed ignored files
Adds "Starting Gear" projection and selections

Adds predefined projection and selection pair for identifying starting gear IDs. Moves existing projections/selection after attribute enumerations so that future ones can reference the values for selections.
Fixes HeroTrackerActivity name

Renames HeroTracker to HeroTrackerActivity. Rename didn't hit the AndroidManifest when the class was renamed.
Adds equipment columns

Adds columns to the Heroes contract class for the equipped primary, secondary, armor, helm, and accessory IDs.
Changes equipment column values.

Changes primary column name since "primary" is a SQLite keyword. Renames other equipment columns to match convention.
Adds equipment columns to database.

Adds the equipment columns to the database creation.
Sets starting gear during hero creation.

Adds code to addHero method to query the item database for all "Brown" rarity items, match the names for the hero's class starting gear, and saves the items' IDs in the hero's database entry.
Adds sections and markdown formatting

Adds markdown formatting, sections, and more content to those sections.