Parse phi-calculus expression to xmir

See #2642, release log:

• a0c2729 by @maxonfjvipon: feat(#2682): messages
• 18a4b56 by @maxonfjvipon: feat(#2682): checkstyle
• 35f91d8 by @maxonfjvipon: feat(#2682): passes
• 237ccc5 by @maxonfjvipon: feat(#2682): passes
• ab3bb12 by @maxonfjvipon: feat(#2682): packs + tests
• 14ca213 by @rultor: Merge branch '__rultor'
• eafd274 by @rultor: Merge branch '__rultor'
• 3553322 by @rultor: Merge branch '__rultor'
• 015f738 by @rultor: Merge branch '__rultor'
• ef024e2 by @Yanich96: fix(#2668): deleted parameter ...
• 1c8472b by @rultor: Merge branch '__rultor'
• 454d3be by @levBagryansky: #2443: Edited message for asse...
• 1b5c5dc by @levBagryansky: #2443: Added message for asser...
• 14a186f by @Yanich96: Merge branch 'master' into fix...
• 17265a6 by @c71n93: #2670 change id
• 54a9b18 by @c71n93: #2670 renamed xsl
• 336bcf2 by @Yanich96: fix(#2668): added todo + fix t...
• fdb2a4f by @c71n93: #2670 add signed test
• 76bbb56 by @maxonfjvipon: feat(#2642): charset
• ce0533d by @maxonfjvipon: feat(#2642): checkstyle
• and 170 more...

Released by Rultor 2.0-SNAPSHOT, see build log