inner-product layer: takes multiple blobs
update inner-product layer doc
unit test: Argmax layer takes multiple blobs
update doc for Argmax Layer
channel-pooling layer takes multiple inputs
crop layer takes multiple input blobs
dropout layer takes ONLY ONE input blob
LRN layer takes ONLY ONE input blob
pooling layer takes multiple input blobs
update doc for pooling layer.
power layer takes multiple blobs
reshape layer takes multiple input blobs
softmax layer takes multiple input blobs
convolution layer takes multiple input blob
update doc for shared parameter layer
fix runtest.jl
update NEWS for v0.0.4
basic doc for solver.
doc for learning policy
doc for momentum policy