* use Devroye instead of Hormann for GIG
* add gig header file
* add gig test
* move using declarations before member declaration
* move using into each function
* fix tab size and add init()
* add test to jamfile
* remove duplicate iostream operators
* fix formatting again
* add to docs
* remove static because they use non-static member
* add const in member functions
* remove duplicate test
* fix typo
* need dist3 in three parameter test
* specify test1 params
* missing using std::cosh
* sinh and cosh under c++11
* set arg3 different in test
* set test arg value different from the default
* add test3 to cover every line in gig
* remove uninitialized variables compile warning in gig operator
* did not add test3 mistakenly
