Typo fixes in documentation

doc/introduction.txt

@@ -165,7 +165,7 @@ Note: There is no short term plan to support multi-node computation.
 Theano Vision State
 ===================
 
-Here is the state of that vision as of 1 October 2012 (after Theano release
+Here is the state of that vision as of October 1st, 2012 (after Theano release
 0.6rc1):
 
 * We support tensors using the `numpy.ndarray` object and we support many operations on them.
@@ -196,8 +196,8 @@ Here is the state of that vision as of 1 October 2012 (after Theano release
   * The profiler used by cvm is less complete than `ProfileMode`.
 
 * SIMD parallelism on the CPU comes from the compiler.
-* Multi-core parallelism is only supported Conv2d. If the external BLAS implementation supports it,
-  there is also, gemm, gemv and ger that are parallelized.
+* Multi-core parallelism is only supported by Conv2d. If the external BLAS implementation supports it,
+  there are also, gemm, gemv and ger that are parallelized.
 * No multi-node support.
 * Many, but not all NumPy functions/aliases are implemented.
   * http://www.assembla.com/spaces/theano/tickets/781