Added role definitions and assignments

Author: VinceSmith

azureadps-2.0-preview/AzureAD/AzureADPreview.md

@@ -239,6 +239,12 @@ Get role definitions
 ### [Get-AzureADMSPrivilegedRoleSetting](Get-AzureADMSPrivilegedRoleSetting.md)
 Get role settings
 
+### [Get-AzureADMSRoleAssignment](Get-AzureADMSRoleAssignment.md)
+Get Azure AD role assignments
+
+### [Get-AzureADMSRoleDefinition](Get-AzureADMSRoleDefinition.md)
+Get Azure AD role definitions
+
 ### [Get-AzureADMSTrustFrameworkPolicy](Get-AzureADMSTrustFrameworkPolicy.md)
 This cmdlet is used to retrieve the created trust framework policies (custom policies) in the directory.
 
@@ -394,6 +400,12 @@ This cmdlet is used to configure a new identity provider in the directory.
 ### [New-AzureADMSInvitation](New-AzureADMSInvitation.md)
 This cmdlet is used to invite a new external user to your directory
 
+### [New-AzureADMSRoleAssignment](New-AzureADMSRoleAssignment.md)
+Create a new Azure AD role assignment
+
+### [New-AzureADMSRoleDefinition](New-AzureADMSRoleDefinition.md)
+Create a new Azure AD role definition
+
 ### [New-AzureADMSTrustFrameworkPolicy](New-AzureADMSTrustFrameworkPolicy.md)
 This cmdlet is used to create a trust framework policy (custom policy) in the directory.
 
@@ -517,6 +529,12 @@ This cmdlet is used to delete an identity provider in the directory.
 ### [Remove-AzureADMSLifecyclePolicyGroup](Remove-AzureADMSLifecyclePolicyGroup.md)
 Removes a group from a lifecycle policy
 
+### [Remove-AzureADMSRoleAssignment](Remove-AzureADMSRoleAssignment.md)
+Remove an Azure AD role assignment
+
+### [Remove-AzureADMSRoleDefinition](Remove-AzureADMSRoleDefinition.md)
+Remove an Azure AD role definition
+
 ### [Remove-AzureADMSTrustFrameworkPolicy](Remove-AzureADMSTrustFrameworkPolicy.md)
 This cmdlet is used to delete a trust framework policy (custom policy) in the directory.
 
@@ -647,6 +665,9 @@ Update a role assignment request
 ### [Set-AzureADMSPrivilegedRoleSetting](Set-AzureADMSPrivilegedRoleSetting.md)
 Update role setting
 
+### [Set-AzureADMSRoleDefinition](Set-AzureADMSRoleDefinition.md)
+Update an Azure AD role definition
+
 ### [Set-AzureADMSTrustFrameworkPolicy](Set-AzureADMSTrustFrameworkPolicy.md)
 This cmdlet is used to update a trust framework policy (custom policy) in the directory.