Changes:
-Restructuring of some functions of the main window
-Use a index list
-Save the index List on the index file
-Search option
Merge branch 'master' of https://github.com/Henry23/RecordsManagementSystem.git

Conflicts:
	RecordsManagementSystem/RecordsManagementSystem.pro.user
	RecordsManagementSystem/mainwindow.cpp
	build-RecordsManagementSystem-Desktop_Qt_5_1_0_MinGW_32bit-Debug/debug/RecordsManagementSystem.exe
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