common: add csv charts
cgi: add csv charts for mfsmaster
master: add support for csv charts
chunkserver: add support for csv charts
common: fix getmonleng
common: new names for variables
cgi:  add csv charts for mfschunkserver
cgi: remove conflict names
common: fix code style, remove unnecessary code
remove  magic numbers, rename variables
cgi: fix error when master & chunkserver die
rename variables, fix code styles
move duplication of define  CHARTS_CSV_CHARTID_BASE to CMakeLists.txt
Merge pull request #26 from jgralak/dev

New feature: CSV charts