More sensible settings for folding and statusline

Changed the settings, so functions and methods start in closed foldstate
and constants, variables and properties are not displayed in the
statusline.
Merge branch 'feature/fix-folding' into develop

Fix #2
Update credits
add support for phpctags memory limits
Merge branch 'feature/add-memory-limit' into develop

Fix #1
Update credits
Fix typo
Merge branch 'fix-typo' into develop