bugfix: double-free in omelasticsearch

closes: http://bugzilla.adiscon.com/show_bug.cgi?id=461
Thanks to Marius Ionescu for providing a detailled bug report
Merge branch 'v7-stable'
omrelp: add "windowSize" parameter to set custom RELP window size
doc: rollback html edit of imfile doc

The html editor did a total rewrite, which causes merges from
older versions to fail miserably.
rollback html editor rewrite of imfile
Merge branch 'v7-stable'
Added script to split impstats logfiles into processable csv files

Python 2.6 or higher is needed to run the script
doc/imfile: re-do spelling corrections
Merge branch 'v7-stable'
doc: add new omrelp parameter "windowSize"
Started implementing stats chart generator
Finsihed implementing chart gemerator script for impstats.

CSV Data generated by statslog-splitter is needed.
To run the chart script, the following packages need to be installed:
	- python pip
	- python cairosvg
With pip install these packages:
	- pip install CairoSVG tinycss cssselect pygal
Finished statslog graph and splitter script.

Also added needed javascript files, so they can be included into the svg files.
This removes dependencies on external sources.

The statslog-splitter can now automatically generated SVG or PNG charts together
with an index.html in the output directory. This helps taking a quick view on all
generated stats data.
Added more command line options to customize the charts and their output
Added support for multiple regex commands, useful for parsing multiple rsyslog formats
Fixed Datetime detection
prepare for 7.4.2 release
Added header in typedefs.h needed for building on ehel 5
Merge branch 'v7-stable-hidden' into v7-stable
doc: mention imported build patch for CENTOS5