v0.1.0

First release of the echoshader package. It includes the following functionalities to visualize echosounder data after major refactoring to introduce an accessor eshader (#131 ):

• echogram
• track
• curtain
• histogram and stats
• interactive linking between them

Up-to-date documentation (#140)

@ldr426 @valentina-s @leewujung @lsetiawan