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Make sure that default learn_start is greater than the minibatch size

Conflicts:
	arcades/environment/smarthome/sweethome/GraphicalAnnotatedSweetHome.lua
	src/environment/states/datasource/init.lua

Building a too long string results in a memory error. Using a table to
concat afterward fix this.

Use a more explicit argument name (so called dump) and recurcively load
arguments if necessary.

This can be used by tools like t-SNE

Conflicts:
	arcades/environment/smarthome/sweethome/GraphicalAnnotatedSweetHome.lua
	expe_template.lua
	src/environment/states/datasource/init.lua

Implement my own logging system as classes to avoid logger dumping

This can be used by tools like t-SNE

Use a max tries value of 3 to simulate user patience