Adding 2 new steps
[GUI] Styling first two steps for web installer.
Adding welcome step in installation process
Create _STATUSFILE within initial state
Adding checks in welcome page
Changing checks by default
Disabling continue button when errors
Removing test conditions
[GUI]Styling new warning message and description for error message.
Changing database step
Hiding port when localhost
Changing database check
Checking install Database step
Developing database step
Angularing welcome step
Changing js include in welcome step.
Adding error class
Adding isWritable check
[GUI] Styling error and warning messages for Installing database screen
Merge branch 'feature/installer' of github.com:XIMDEX/ximdex into feature/installer

* 'feature/installer' of github.com:XIMDEX/ximdex:
  Adding isWritable check