Minor typo fixes in NEWS

NEWS.txt

 Trunk sin last release
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  * Sparse type is now supported by the shape op and the ShapeFeature optimizer work correctly with them.
- * fuse GpuElemwise more often(in the case where their is too many inputs that fusing all of them would bust the 256 bytes limits of parameter to gpu function)
- * Speed up gemv by a work around scipy gemv slowness when the matrix is in c order(the default)
+ * Fuse GpuElemwise more often (in the case where there are so many inputs that fusing them all would bust the 256 bytes limit of parameter to gpu function).
+ * Speed up gemv by a work around scipy gemv slowness when the matrix is in C order (the default).
 
 Theano 0.3 (2010-11-23)
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