TL compatibility and code readabality

[pskrunner14]

• Made code compatible with TL1.10.1 and TF1.10.0.
• Removed out size and batch_size from DeConv2D layers since they're no longer needed.
• Replaced tl.act.lrelu with tf.nn.leaky_relu since former is deprecated.
• Replaced tl.layers.initialize_global_variables with tf.global_variables_initializer since former is deprecated.
• Changed flag train_size dtype from int to float due to an error.
• Impoved code readability and removed redundant comments and code.
• Removed pprint in favour of custom logging the flags since pprint was'nt able to access flag values.
• Fixed wildcard imports and removed unused ones.
• Updated main module doc.
• Removed tensorlayer package from root dir since it is installed on system.

Note: Fixes #9 and #12.