Patch ImagView

Highlights:
- Major improvements to the contrast GUI (Ron Rock)
- Better handling of windows and canvases as instances
- More flexible display, e.g., grid-of-images
- API for retrieving test images
- Optional opening image files with the file dialog
Bump ODBC sha1
Bump ODBC sha1
Patch Profile (fix ccall arg order)
Add DataFrames v0.3.8
Add the ASCIIPlots package
bump HttpParser version to 0.0.2
Merge pull request #335 from astrieanna/http-parser2

bump version of HttpParser from v0.0.1 to v0.0.2
Patch HDF5 (Handle immutables and non-exported types in JLD)
DataStructures version 0.2.4
Bump Datetime sha1
Datetime: bump SHA1 to latest.
Add HopfieldNets package
NumericExtensions version 0.2.12 (add normalization and scanning)
First commit
Patch Units (fix memio->IOBuffer deprecation)
Merge pull request #336 from AndreyKolev/GARCH

Add GARCH package implementing Generalized Autoregressive Conditional Heteroskedastic model estimation and prediction.
Distributions version 0.2.3
Bump version of GLM package.
Merge pull request #339 from dmbates/devel

Bump version of GLM package.