renaming mapSetting.ui -> mapsettings.ui

Cosmetic changes, for coherence
removing gridlayout
Merge pull request #5 from yjacolin/improveui1

removing gridlayout
Integration of mapsettings dialog

- Removing unkown widget for now (colour selector)
- Introducing cpp files for mapsettings
Revamp of mapfile lifecycle
implement save method and start saveAs method
Add saveAs action + disable save action by default (TODO: to enabled as soon as mapfile object has been changed)
Merge pull request #6 from yjacolin/saveAction

Save action
Add new mapToolBar
Merge pull request #7 from yjacolin/mapToolBar

Add new mapToolBar
add readme file
Merge pull request #8 from yjacolin/readme

add readme file
change Help shorcut to F1
Merge pull request #9 from yjacolin/helpShorcut

change Help shorcut to F1