cleaned up gitignore

Signed-off-by: Ladislas de Toldi <ladislas@weareleka.com>
changed processing app names

to visualize the data live, use get_data
to read saved data, use read_data

Signed-off-by: Ladislas de Toldi <ladislas@weareleka.com>
changed the processing font to Leka_Font

Signed-off-by: Ladislas de Toldi <ladislas@weareleka.com>