Changelog for vector-0.12.2.0

Changes in version 0.12.2.0

Add MINIMAL pragma to Vector & MVector type classes: #11
Export unstreamM fromfrom Data.Vector.Generic: #70
New functions: unfoldrExactN and unfoldrExactNM: #140
Added iforM and iforM_: #262
Added MonadFix instance for boxed vectors: #178
Added uncons and unsnoc: #212
Added foldMap and foldMap': #263
Added isSameVector for storable vectors
Added toArray, fromArray, toMutableArray and fromMutableArray
Added iscanl, iscanl', iscanr, iscanr' to Primitive, Storable and Unboxed
Added izipWithM, izipWithM_, imapM and imapM_ to Primitive and Storable
Added ifoldM, ifoldM', ifoldM_ and ifoldM'_ to Primitive and Storable
Added eqBy and cmpBy
Added findIndexR to Generic: #172
Added catMaybes: #329
Added mapMaybeM and imapMaybeM: #183

Fix integer overflows in specializations of Bundle/Stream enumFromTo on Integral types
Fix possibility of OutOfMemory with take and very large arguments.
Fix slice function causing segfault and not checking the bounds properly.
updated specialization rule for EnumFromTo on Float and Double to make sure it always matches the version in GHC Base (which changed as of 8.6) Thanks to Aleksey Khudyakov @Shimuuar for this fix.
fast rejection short circuiting in eqBy operations
the O2 test suite now has reasonable memory usage on every GHC version, special thanks to Alexey Kuleshevich (@lehins).
The Mutable type family is now injective on GHC 8.0 or later.
Using empty Storable vectors no longer results in division-by-zero errors.
The Data instances for Vector types now have well defined implementations for toConstr, gunfold, and dataTypeOf.
New function: partitionWith.
Add Unbox instances for Identity, Const, Down, Dual, Sum, Product, Min, Max, First, Last, WrappedMonoid, Arg, Any, All, Alt, and Compose.
Add NFData1 instances for applicable Vector types.

Fixes issue #220, compact heap operations crashing on boxed vectors constructed using traverse.
backport injective type family support
Cleanup the memset code internal to storable vector modules to be compatible with future Primitive releases

Documentation fixes/additions
New functions: createT, iscanl/r, iterateNM, unfoldrM, uniq
New instances for various vector types: Semigroup, MonadZip
Made Storable vectors respect memory alignment
Changed some macros to ConstraintKinds
- Dropped compatibility with old GHCs to support this
Add Eq1, Ord1, Show1, and Read1 Vector instances, and related helper functions.
Relax context for Unbox (Complex a).

Define Applicative instances for Data.Vector.Fusion.Util.{Box,Id}
Define non-bottom fail for instance Monad Vector
New generalized stream fusion framework
Various safety fixes
- Various overflows due to vector size have been eliminated
- Memory is initialized on creation of unboxed vectors
Changes to SPEC usage to allow building under more conditions

Export MVector constructor from Data.Vector.Primitive to match Vector's (which was already exported).
Fix building on GHC 7.9 by adding Applicative instances for Id and Box