Rephrase the section about the Parking and mobile mail demos

 - Responsive is no longer an add-on, rephrased to reflect this
 - Updated mobile mail URL to point to Github

Change-Id: Ie5c6b139c9dd7f5da5e8652ebb5dae9937cfd1c8
Grammatical corrections to the section about the Vornitologist demo

Change-Id: Ic1e128f69f2484df1bc799f0d13e87b5d8ab41d0
Fix the facts in the interaction section

 - "long tap" is not usually comparable to double-click

Change-Id: If7e3e6884fdb603c284ae72c896610b17d2f7d52
Rephrased and fixes of text

 - keyboard section of human interface
 - the mobile considerations section

Change-Id: I63205eba60716748656381e4e63030219536990f
Refined the mobile.installation section

Change-Id: Iedcfab46dc087a73fe0690a313670f414eb55cac
Small fixes to the mobile.project section

Change-Id: I904fab95021184703567e6ce1fea9a9b463454b0