made EntryLogs and Summary tabbed fragments that MainActivity uses.
included the sign out functionality in MainActivity
added the created files to the pull request
Fix another small Checkstyle problem
added an additional comment in EntryLogsTab
merged with master
deleted EntryLogsActivty and SummaryActivity
fixed LogoActivity lauching into a fragment
RegisterActivity should go to MainActivity, not EntryLogsTab
added author in SummaryTab
Merge pull request #115 from coldstar96/tabbed-app

Tabbed app
Fixed a NullPointerException in AddEntryActivity
Merge pull request #117 from coldstar96/addentryactivity-fix

Fixed a NullPointerException in AddEntryActivity
Merge branch 'master' of https://github.com/coldstar96/cse403 into edit

Conflicts:
	res/values/strings.xml
	src/com/example/budgetmanager/EntryLogsActivity.java