Initial Checkin

CombinatoricsNodes wraps combinatorics implementations of Adrian Akison, taken from his CodeProject article

http://www.codeproject.com/Articles/26050/Permutations-Combinations-and-Variations-using-C-G

Contains:
Combinations (Color Combinatorics)
Combinations (Spreads Combinatorics)
Combinations (String Combinatorics)

Permutations (Spreads Combinatorics)
Permutations (String Combinatorics)

Variations (Color Combinatorics)
Variations (Spreads Combinatorics)
Variations (String Combinatorics)
- help now starts with capital letter
- removed Version = "Cobinatorics"
- renamed / updated helppatches accordingly
- removed unnecessary tags
- added Combinations (Enumerations)/(Raw)/(Transform) and their helppatches
- added Variations (Enumerations)/(Raw)/(Transform) and their helppatches
updated leap sdk
leap should now request frames in background too
small fix in spread extentions, added help text to select plugin
added  GetUpStreamSlices(...) and IsConvoluted { get; } to INodeIn for performance reasons. IsConvoluted for now always returns true
Merge branch 'develop' of github.com:vvvv/vvvv into develop
introduced IBackgroundColor
Merge branch 'develop' of https://github.com/vvvv/vvvv into develop
Merge pull request #162 from antongit/develop

Keyboard&Mouse: Helppatches and Girlpower
Merge commit 'f6a3fb23109e435514778abf8f166abf9828a95d' into develop
Tokenizer and RS232 helppatches update
Fixed null pointer exception
moved license file from dependencies into combinatorics root directory
typo
Merge pull request #151 from bj-rn/develop

Combinatorics Nodes
Merge pull request #164 from ravazquez/develop

Fixed null pointer exception
Merge branch 'develop' of https://github.com/vvvv/vvvv-sdk into develop
Tokenizer help final. West has approved the snippet.