Use tuples for hierarchical indexing
Minor updates, change project files to VS2012 format
Fix grouping of missing values, hierarchical slicing extensions, some frame binary operators, ToString on series
Merge pull request #23 from tpetricek/master

Hierarchical indexing now uses tuples
Make series.ordered lazy, check if keys are comparable first
Merge branch 'master' of github.com:BlueMountainCapital/FSharp.DataFrame
Fix EndAt and StartAt and slicing out of key ranges
Basic hierarchical indexing done (#12), better frame aggregation (#6), move files, nicer pretty print
Adding slicing
Merge pull request #24 from tpetricek/master

Adding sampling
Improve documentation and comments, add API reference
Merge branch 'master' of github.com:BlueMountainCapital/FSharp.DataFrame
Update solution
Minor changes and rename
Move back
Update docs and fix index operations
Minor tweaks and update build and docs
Add some TS documentation, append TS, testing stuff
Improve lazy loading and add documentation
Documentation improvements & various fixes

Simplify DelayedSeries and add tests
Improve CSV loading
Do not shrink empty data frames
Documentation and API reference templates