organizing the docs - put the content in a content folder. put the SimPEG core api docs in core_api

docs/index.rst

@@ -41,8 +41,8 @@ About SimPEG
 .. toctree::
    :maxdepth: 2
 
-   api_bigPicture
-   api_installing
+   content/api_core/api_bigPicture
+   content/api_core/api_installing
 
 Examples
 ********
@@ -50,7 +50,7 @@ Examples
 .. toctree::
    :maxdepth: 2
 
-   api_Examples
+   content/api_core/api_Examples
 
 Packages
 ********
@@ -58,11 +58,11 @@ Packages
 .. toctree::
    :maxdepth: 3
 
-   em/index
-   dc/index
-   ip/index
-   mt/index
-   flow/index
+   content/em/index
+   content/dc/index
+   content/ip/index
+   content/mt/index
+   content/flow/index
 
 Finite Volume
 *************
@@ -70,7 +70,7 @@ Finite Volume
 .. toctree::
    :maxdepth: 3
 
-   api_FiniteVolume
+   content/api_core/api_FiniteVolume
 
 Forward Problems
 ****************
@@ -78,7 +78,7 @@ Forward Problems
 .. toctree::
    :maxdepth: 3
 
-   api_ForwardProblem
+   content/api_core/api_ForwardProblem
 
 Inversion Components
 ********************
@@ -86,7 +86,7 @@ Inversion Components
 .. toctree::
    :maxdepth: 3
 
-   api_InversionComponents
+   content/api_core/api_InversionComponents
 
 Utility Codes
 *************
@@ -94,7 +94,7 @@ Utility Codes
 .. toctree::
    :maxdepth: 3
 
-   api_Utilities
+   content/api_core/api_Utilities
 
 
 Project Index & Search