added legacy manual pdf + changelog.md

.gitignore

@@ -9,7 +9,6 @@ log.*
 *.py~
 *.pyc~
 out*
-*.pdf
 build
 PyDEM.egg-info
 dist
@@ -20,3 +19,4 @@ PyGran.egg-info*
 PyGran/demo/scripts/DEM/multisphere/mesh/tumbler.stl
 LIGGGHTS-PUBLIC
 _docs
+_manual

CHANGELOG.md

@@ -0,0 +1,38 @@
+# Changelog
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and as of v1.2 this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+
+## [1.1.0]
+### Added
+
+- New dynamic contact model module for the LIGGGHTS-PUBLIC engine. Currently this module supports only contact models derived from the spring-dashpot model.
+- Support for dynamic keyword parsing in the LIGGGHTS-PUBLIC engine.
+- New tutorial for installing PyGran/LIGGGHTS on Ubuntu 18.04 LTS.
+
+### Changed
+- Renamed Simulator, Analyzer, and Material modules to simulation, analysis, and params, respectively.
+- Fixed bug in the contact duraction computation of the numerical solver in the simulation module.
+
+
+## [1.2.0]
+### Added
+- New configure function for specifying which LIGGGHTS version to use
+- New `increment' option for System frame propagation. Certain frames can now be skipped when reading multiple traj files.
+- Cell and point attributes are exposed separately via: Mesh.points.attr and Mesh.cells.attr
+- New version navigation
+- Online documentation based on Sphinx
+
+### Removed
+- Manual in pdf format
+
+### Changed
+- SubSystem objects are now constructed only once (factory) and thus retain the same memory address from frame to frame
+- Mesh SubSystem now takes the optional arg 'avgCellData' which transforms cell arrays to their weighted-avg values
+- System can now be constructed with additional arguments passed for each SubSystem type
+- System rewinds itself after the last frame is reached and it starts reading frame 1 when it is looped over.
+- Fixed bug with System frame propagation when both Particles and Mesh were stored
+- Fixed bug in SSMP mode when the slave processors did not produce any output 
+- Fixed bug with user-created scripts importing themselves (leading to double execution)