* add missing install note for rosdep to the README

fix typo for explore_penalty

I tried to build the avoidance repo just now, and the build failed
with clang. The error in clang is just a warning in gcc, so gcc builds,
but with warnings. I've taken the warnings reported by both clang and
gcc, and tried to fix them.

The issues were

* assigning from an uninitialized variable,
* reaching the end of a non-void function, and
* passing a std::string to a "%s" specifier (expects char*).

* README: Add improve melodic setup

* Update README.md

* Touch a few points so I can ask questions

* Tidy out dependencies

* tidy mavros install part

* Fix bad world export

* Fix typo

* Remove statement that you need to check mavros version

* Remove invalid  ros-melodic-yaml- dependency

* Clarify how you view the disparity map

* Tidy

* Add correct dependencies

*  [Global Planner] Fix Alt Prior handling

alt_prior_ is pre-defined & limited length std::vector (currently 25 elements are defined)
Accessing out of index of this vector for path finding can cause path finder to fail, thus high altitude RTL is not available in current status.
This would allow high altitude RTL to work in current master, tested in SITL.

* Fixed code style

Co-authored-by: Seunghwan Jo <snipertype@hotmail.com>

* Revert "Get Rid of TF Warnings (#511)"

* Clean up point cloud transform locks

* Use condition variables for lower latency

* Small cleanup

* Exit quickly, gentler on allocator with swap

* Decouple wp thread from planner thread

* Use condition variable to wait for transformed camera data for the planner, if it isn't available yet.

* Add Jenkins file

* Fix directory path

* rename colprev params

This is to reflect the new parameter names in ~1.10 firmware.

* fix param race condition

* use lock guard

* remove iris and vtol with cameras models because they are now hosted in PX4 SITL Gazebo

* rename models not to include numbers and to describe camera type

the world file name parameter lives

local planner: if a cloud has not yet been transformed but a new one has already arrived, drop the new cloud. If the cloud cannot be transformed for one second, use the new pointcloud

* increase code coverage of the local planner waypoint generator

* improve coverage of avoidance common

* Fix NaN goto points

* Fix style

* Add timeouts for wait

* Add coverage targets for avoidance and local_planner

* Add travis target for coverage

* Fix CMAKE_BUILD_TYPE

* Zero counters, use source as base directory, remove tests

* Improve .travis

* Fix catkin target issue

* Also build global and safe landing planner coverage

* Try coveralls integration

* Fix indent

* Try to find where coverage files are

* Fix CMake warnings

* Add a script to generate the html coverage with

* Add coverage report to README

* Disable branch coverage

* Make paths in coverage file relative

* Revert "Add timeouts for wait"

This reverts commit ce6865360683e988c1733cee13c41d13de9c32fe.

* Port LocalPlannerNode to nodelets

* hacks to make nodelet work

* fix param namespace

* Support running local_planner as node

* Fix tests

* Refactor LocalPlannerNode to LocalPlannerNodelet

* Update path

* Fix launchfile for nodelets

* Fix test broken from refactor

* Update valgrind suppressions

* Update CMake

* Fix local_planner_node

* Move thread join to destructor

* Make destructure of nodelet virtual

* Fix warnings

* fix style

* register dynamic params under nodelet

* Fix debug build

* Fix segfault in roscore tests

* Update Valgrind suppressions