minor changes to prevent warning / errors

- make sure empty string test is made against a string
- removed an escape character that awk reports as ignored
- ignore errors when removing left-over intermediary .jtl files (or we
should test if they still exist before rm'ing them)
debug mode, working directory, additional logs

add: debutg mode (keep intermediary results and work files)
add: work directory for each project
add: jmeter execution log collection (may be big but can be useful to
have client side exceptions)
update readme

add: tips for use with Cygwin
add: debug option
update readme
update readme

code block fix
readme update

not used to this markdown :/
mod: split setup and install

- Split setup and install to be able to update small files like
jmeter.sh per test without reinstalling
- Fixed jmeter.sh upload (was using demo file name jmeter)
fix: bash greater than
fix: duration
install chrome and chrome driver
install jmeter plugins
install xvfb
Merge branch 'master' of https://github.com/ino-bto/jmeter-ec2

# By ino
# Via ino
* 'master' of https://github.com/ino-bto/jmeter-ec2:
  fix: duration
  fix: bash greater than
  mod: split setup and install
  readme update
  update readme
  update readme
  update readme
  debug mode, working directory, additional logs
  minor changes to prevent warning / errors

Conflicts:
	jmeter-ec2.sh