Enhance BUILD installation documentation. Fix some alignement style.

BUILD

@@ -130,8 +130,9 @@ OpenMVG can be used as a third party once it have been installed.
 Because it can use it's own ceres version, it's better to install it locally and not in system files.
 So please consider using the CMAKE_INSTALL_PREFIX cmake variable to specify a local installation directory.
 
-Here the syntax to add the variable to the cmake command line:
--DCMAKE_INSTALL_PREFIX:STRING="./openMVG_install"
+Here the syntax to add the variable to the cmake command line (use absolute path):
+-DCMAKE_INSTALL_PREFIX:STRING="YourInstallPath"
+i.e: -DCMAKE_INSTALL_PREFIX:STRING="/home/user/Dev/github/openMVG_Build/openMVG_install"
 
 Perform "make" and "make install"
 

src/openMVG/sfm/pipelines/global/GlobalSfM_rotation_averaging.cpp

@@ -53,12 +53,13 @@ bool GlobalSfM_Rotation_AveragingSolver::Run(
         return false;
       KeepOnlyReferencedElement(set_remainingIds, relativeRotations);
     }
-	break;
+  break;
     default:
-    std::cerr << "Unknown relative rotation inference method: " 
-            << (int) eRelativeRotationInferenceMethod << std::endl;
+    std::cerr
+      << "Unknown relative rotation inference method: "
+      << (int) eRelativeRotationInferenceMethod << std::endl;
   }
-      
+
   // Compute contiguous index (mapping between sparse index and contiguous index)
   //  from ranging in [min(Id), max(Id)] to  [0, nbCam]
 
@@ -128,7 +129,9 @@ bool GlobalSfM_Rotation_AveragingSolver::Run(
     }
     break;
     default:
-    std::cerr << "Unknown rotation averaging method: " << (int) eRotationAveragingMethod << std::endl;
+    std::cerr
+      << "Unknown rotation averaging method: "
+      << (int) eRotationAveragingMethod << std::endl;
   }
 
   if (bSuccess)
@@ -138,7 +141,7 @@ bool GlobalSfM_Rotation_AveragingSolver::Run(
       map_globalR[_reindexBackward[i]] = vec_globalR[i];
     }
   }
-  else{
+  else {
     std::cerr << "Global rotation solving failed." << std::endl;
   }