Remove Libs: content from pkg-config template

I missed doing this when issue #27 was fixed.
Merge pull request #34 from RhysU/fix_pc_in

Remove Libs: content from pkg-config template
Make get_antioch_version inline

Also makes antioch_version_stdout inline to avoid -Wunused warnings.
Reorders methods to remove the need for forward declarations.
Closes #35 on private testing.
Merge pull request #36 from RhysU/static_version_method

Make get_antioch_version static
Any Kooij with a beta = 0 is converted into Arrhenius,

tests is added in parsing_xml.C and its input file
This warning is not from deprecated code...
Merge pull request #39 from SylvainPlessis/Kooij-Arr

Fix issue #38
Ridiculous bug I've introduced...
Here's the code as it should have been all along...
Forgotten Tref() method definition in VantHoffRate
Merge pull request #43 from SylvainPlessis/kin_Tref

Forgotten Tref() method definition in VantHoffRate, rebased and merged
PR's and Mailing Lists

Point out we are happy to look at PR's as well as the user
and devel mailing lists.
Merge pull request #48 from pbauman/readme_mailing_lists

README: PR's and Mailing Lists
Merge branch 'master' of https://github.com/libantioch/antioch into photochemistry

Conflicts:
	src/parsing/include/antioch/read_reaction_set_data_xml.h
	test/parsing_xml.C