Set leveldb options.max_open_files = 100. Fix #13 and #38
Merge pull request #154 from sguada/leveldb_max_open_files

Set leveldb options.max_open_files = 100 and Fix #13 and #38
implemented padding aware im2col and col2im functions
add test code to test the padding aware im2col col2im functions
add code to measure timing
remove the pad=0 case in conv_layer and im2col_layer
remove padding layers in imagenet definitions
unified to padding aware version

remove test code (no longer needed and won't compile)
remove padding_layer and its test
remove cuda_timer as is no longer needed
Merge pull request #128 from mavenlin/pad-im2col

im2col and col2im learn to pad and padding layer is obsolete
add pascal class list for reference

(1 indexed to reserve 0 for background)
move imagenet splits + synsets to data
add imagenet mean file
file mnist
Make tools/ for core binaries, stow scripts/ in tools/extra

Collect core Caffe tools like train_net, device_query, etc. together in
tools/ and include helper scripts under tools/extra.
fix mnist comments in cifar example