[fix] check solver prototxt parsing
Merge pull request #1226 from longjon/check-solver-prototxt

[fix] check solver prototxt parsing
[example] fix data script paths for flickr fine-tuning
[example] add LeNet to MNIST title, fix paths to be from root
[example] re-title LeNet / MNIST heading too
[docs] update homebrew instructions for boost and boost-python split
[docs] note boost 1.56 an CUDA conflict on OS X
Added Multistep, Poly and Sigmoid learning rate decay policies

Conflicts:
	include/caffe/solver.hpp
	src/caffe/proto/caffe.proto
	src/caffe/solver.cpp
[docs] pip install packages in order for dependencies
[docs] pip install harder
[examples] fix reference model name for flickr fine-tuning
[docs] proofreading suggested by @cNikolaou
Added first_key and last_key to dataset
Merge pull request #1288 from sguada/first_last

Added first_key and last_key to dataset
Added encoded option and check_size to convert_imageset

Conflicts:
	tools/convert_imageset.cpp
Added encoded datum to io
Added test for encoded Datum to test_io.cpp
Added timers for benchmarking
Add fast code for transform(cv::Mat,Blob)
Add root_folder to ImageDataLayer